Prospective evaluation of clinical safety and efficacy of left bundle branch area pacing in comparison with right ventricular sepal pacing

2021 ◽  
Author(s):  
Xing Liu ◽  
Wenbin Li ◽  
Jianping Zeng ◽  
He Huang ◽  
Lei Wang ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Clinical Trial Registry ◽  
Clinical Safety ◽  
Ventricular Ejection Fraction ◽  
Safety And Efficacy ◽  
His Bundle ◽  
Mechanical Synchrony

Abstract BackgroundLeft bundle branch area pacing (LBBaP) has recently emerged as alternative a new physiologic strategy of pacing to His-bundle pacing (HBP) associated with difficulty of lead implantation, His bundle damage, high and unstable thresholds.ObjectiveThe purpose of this study is to compare clinical safety and efficacy of LBBaP with right ventricular sepal pacing (RVSP).MethodsFrom February 2019 to May 2020, consecutive pacing-indicated patients were prospectively enrolled and divided into two groups. Ventricular synchrony index such as QRS duration (QRSd), interventricular mechanical delay (IVMD) and septal-posterior wall motion delay (SPWMD), left ventricular function such as left ventricular end-diastolic diameter (LVEDD) and left ventricular ejection fraction (LVEF), pacing parameters, and complications were evaluated in perioperative period and during follow-up.ResultsLBBaP was successful in 45 patients (88.2%), and finally 46 patients underwent RVSP. With LBBaP, the ventricular electrical- mechanical synchrony were similar with the native-conduction system (P = .784). However, the ventricular electrical synchrony (QRSd, 108.47 ± 7.64 vs 130.63 ± 13.63 ms, P < .0001) and mechanical synchrony (IVMD, 27.68 ± 4.33 vs 39.88 ± 5.83, P < .0001; SPWMD, 40.39 ± 23.21 vs 96.36 ± 11.55, P < .0001) in the LBBaP group were significantly superior to the RVSP group. No significant differences in LVEDD (46 [44-48.5] vs 47 [44–52] mm, P = .488) and LVEF% (66 [62.5–70] vs 64 [61–68], P = .759) were noted in both two groups at last follow-up. But, in the subgroup analysis, LVEDD was shorter (46 [44–49] vs 50 [47–58] mm, P = .032) and the LVEF% was higher (65 [62–68] vs 63 [58–65], P = .022) in the LBBaP-H (high ventricular pacing ratio > 40%) group compared with RVSP-H group at last follow-up. There was lower capture thresholds (0.59 ± 0.18V vs. 0.71 ± 0.26V, P = 0.011) at implantation in the LBBaP group than RVSP group, and R-wave amplitudes and pacing impedances did not differ between the two groups. No serious complications were found in both two groups at implantation and follow-ups.ConclusionThis study confirms the clinical safety and efficacy of LBBaP, and that produces better ventricular electrical-mechanical synchrony than RVSP. The event of pacing-induced left ventricular dysfunction is lower in the LBBaP-H group than RVSP-H group.Trial registrationTrial registration Chinese Clinical Trial Registry, ChiCTR2100046901, Registered 30 May 2021—Retrospectively registered, http://www.chictr.org.cn/searchproj.aspx?regstatus=1008001.

P4553Clinical and prognostic value of right ventricular dysfunction in patients with chagas heart disease during acute decompensated heart failure

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
S R R Siqueira ◽  
S M Ayub-Ferreira ◽  
P R Chizzola ◽  
V M C Salemi ◽  
S H G Lage ◽  
...  
Keyword(s):  
Heart Failure ◽  
Right Ventricular ◽  
Prognostic Value ◽  
Acute Decompensated Heart Failure ◽  
Decompensated Heart Failure ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Ventricular Ejection Fraction ◽  
Jugular Venous Distension

Abstract Introduction The occurrence of right ventricular disfunction (RVD) is common in heart failure (HF) patients due to Chagas' disease (ChD). However, its clinical and prognostic value has not been studied during episodes of acute decompensated heart failure (ADHF). Purpose Evaluate the prognostic value of RVD in ADHF patients with ChD during hospitalization and after 180 days of discharge compared to other etiologies. Methods We analysed a prospective cohort of consecutive 768 patients admitted for ADHF between March 2013 and October 2018; 490 (63.7%) patients were male and the median age was 58 (48.3–66.8) years and left ventricular ejection fraction was 26% (median) (IQR 22–35%). We compared the clinical characteristics and the prognosis of ChD patients according to the presence of RVD in the echocardiogram to other etiologies. Results RVD was presented in 289 (37.6%) patients. Among patients with non-chagasic etiologies, those with RVD were younger [53 (41–62) vs 61 (52–70) years, p<0.0001], had high levels of BNP in the moment of hospitalization [1195 (606–2209) vs 886 (366– 555) pg/mL], p<0,0001], received more inotropes (79.2% vs 57.9%, p<0,0001), had longer hospitalization [35 (17–51) vs 21 (10–37) days, p<0.001] and more clinical signs of congestion as hepatomegaly (49% vs 28.6%, p<0.0001); jugular venous distension (68.3% vs 41.2%, p<0.0001) and leg edema (65.4% vs 49.2%, p=0.001). Among patients with ChD, those with RVD were older [61 (48- 66) vs 58 (48 - 67) years, p=0.017], and had more frequently signs of hypoperfusion (56.8% vs 36.5%, p=0.029), jugular venous distension (72.8% vs 52.8%, p=0.01) and hepatomegaly (56.8% vs 31.1%, p=0.011), higher BNP levels [1288 (567–2180) vs 1066 (472–2007) pg/mL, p=0.006] and more frequent use of intravenous inotropes (88.9% vs 67.1%, p=0.003); additionally ChD patients with RVD had a higher rate of death and transplant during hospitalization (51.2% vs 38.3%, p=0.001). When all groups were compared together, ChD patients with RVD had the highest rate of death, transplant and readmissions at 180-days of follow-up (Figure). Figure 1 Conclusion Patients with RVD demonstrated a distinct clinical presentation, biomarkers and worse prognosis in all etiologies. ChD patients with RVD in ADHF had the worst prognosis with the highest rate of death, heart transplant e rehospitalization in follow-up.

Genotype–phenotype correlation in arrhythmogenic right ventricular cardiomyopathy—risk of arrhythmias and heart failure

2021 ◽  
pp. jmedgenet-2021-107911
Author(s):  
Alex Hørby Christensen ◽  
Pyotr G Platonov ◽  
Henrik Kjærulf Jensen ◽  
Monica Chivulescu ◽  
Anneli Svensson ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Arrhythmogenic Right Ventricular Cardiomyopathy ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Carrier Status ◽  
Ventricular Cardiomyopathy ◽  
Ventricular Ejection Fraction ◽  
Male Sex ◽  
The Impact

BackgroundArrhythmogenic right ventricular cardiomyopathy (ARVC) is predominantly caused by desmosomal genetic variants, and clinical hallmarks include arrhythmias and systolic dysfunction. We aimed at studying the impact of the implicated gene(s) on the disease course.MethodsThe Nordic ARVC Registry holds data on a multinational cohort of ARVC families. The effects of genotype on electrocardiographic features, imaging findings and clinical events were analysed.ResultsWe evaluated 419 patients (55% men), with a mean follow-up of 11.2±7.4 years. A pathogenic desmosomal variant was identified in 62% of the 230 families: PKP2 in 41%, DSG2 in 13%, DSP in 7% and DSC2 in 3%. Reduced left ventricular ejection fraction (LVEF) ≤45% on cardiac MRI was more frequent among patients with DSC2/DSG2/DSP than PKP2 ARVC (27% vs 4%, p<0.01). In contrast, in Cox regression modelling of patients with definite ARVC, we found a higher risk of arrhythmias among PKP2 than DSC2/DSG2/DSP carriers: HR 0.25 (0.10–0.68, p<0.01) for atrial fibrillation/flutter, HR 0.67 (0.44–1.0, p=0.06) for ventricular arrhythmias and HR 0.63 (0.42–0.95, p<0.05) for any arrhythmia. Gene-negative patients had an intermediate risk (16%) of LVEF ≤45% and a risk of the combined arrhythmic endpoint comparable with DSC2/DSG2/DSP carriers. Male sex was a risk factor for both arrhythmias and reduced LVEF across all genotype groups (p<0.01).ConclusionIn this large cohort of ARVC families with long-term follow-up, we found PKP2 genotype to be more arrhythmic than DSC2/DSG2/DSP or gene-negative carrier status, whereas reduced LVEF was mostly seen among DSC2/DSG2/DSP carriers. Male sex was associated with a more severe phenotype.

P3689Association of echocardiographic progression and genetic profile in arrhythmogenic right ventricular cardiomyopathy

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
F Guastafierro ◽  
S Hosseini ◽  
P S Heiniger ◽  
S Anwer ◽  
N Kuzo ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Arrhythmogenic Right Ventricular Cardiomyopathy ◽  
Left Ventricular ◽  
Right Atrial ◽  
Left Ventricular Ejection ◽  
Genetic Profile ◽  
Ventricular Ejection Fraction ◽  
Significant Difference ◽  
Echocardiographic Findings

Abstract Background Arrhythmogenic right ventricular cardiomyopathy (ARVC) is frequently associated with mutations in genes coding for desmosomal proteins. In this study, we investigated the association of genetic status with ARVC progression as defined by echocardiographic parameters. Methods We tested 62 ARVC patients for their genetic profile. Accordingly, they were grouped in mutation positive (48 (77%) patients; median age 48.5 years; 33 (69%) males), and mutation negative (14 (23%) patients; median age 45 years; 10 (71%) males). Prevalent mutations were Desmoglein-2 (DSG2) in 16 (26%), Desmoplakin (DSP) in 14 (23%), and Plakophilin-2 (PKP2) in 9 (15%) patients. Results At baseline, there were no significant differences in clinical characteristics between the two groups. Patients were followed-up for a median time period of 1420 days, and there was no significant difference in the duration of follow-up between the two groups (p=0.05). In the mutation positive group, there was a significant increase in right ventricular end-diastolic area (p=0.002), right atrial short (p=0.008) and long (p=0.002) diameter, left atrial diameter (p=0.014), and a decrease in left ventricular ejection fraction (p=0.014) during follow up. Right ventricular functial parameters did not change significantly (tricuspid annular plane systolic excursion: p=0.24; fractional area change: p=0.088). In the mutation negative group, none of the aforementioned echocardiographic findings exhibited any significant difference during follow-up: right ventricular end-diastolic area (p=0.1); right atrial short (p=0.7) and long (p=0.9) diameter, left atrial diameter (p=0.6), and left ventricular ejection fraction (p=0.3). Similarly, right ventricular functional parameters did not change significantly (tricuspid annular plane systolic excursion: p=0.77; fractional area change: p=0.80. Results are summarized in the figure. Change in echocardiographic findings. Conclusions There is a strong association between echocardiographic progression of ARVC phenotype and the presence of a pathogenic mutation. Such mutations should be searched in all patients with an ARVC phenotype, and mutation positive individuals should be followed-up in shorter intervals.

P1487Cardiac resynchronization through His bundle pacing in patients with heart failure

EP Europace ◽  
2020 ◽  
Vol 22 (Supplement_1) ◽  
Author(s):  
M T Moraleda Salas ◽  
A Sigismondi ◽  
A Arce Leon ◽  
J M Fernandez Gomez ◽  
A Manovel Sanchez ◽  
...  
Keyword(s):  
Heart Failure ◽  
Ventricular Dysfunction ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Left Ventricular Ejection ◽  
Ventricular Ejection Fraction ◽  
His Bundle ◽  
His Bundle Pacing ◽  
Patients With Heart Failure

Abstract Introduction and purpose Permanent His bundle pacing (p-HBP) can correct intraventricular conduction disorders and could be a physiological alternative for traditional cardiac resynchronization therapy (CRT) via the coronary sinus: our aim was to describe our results in patients with heart failure and ventricular dysfunction who were resynchronized by p-HBP. Methods Prospective descriptive study of patients with CRT indication and who were resynchronized by p-HBP, using the specific tools. The correction of bundle branch block (BBB) by His bundle pacing (HBP) has been previously checked. We analyzed: the global success of the implant, the His thresholds, and the improvement in left ventricular ejection fraction (LVEF) at one month of follow-up. Results We included 54 patients (median age 66 (56-72)) with an indication for CRT: 89% (n = 48) with heart failure (HF), left bundle block branch (LBBB) and LVEF &lt;35%; 3% (n = 2) with HF, right bundle block branch (RBBB) and LVEF &lt;35%; 2% (n = 1) with permanent pacemaker, ventricular dysfunction and ventricular pacing &gt;40%; and 6 % (n = 3) with complete AV block, LBBB and ventricular dysfunction. With HBP we corrected the BBB in 83% of patients (n = 45), and we achieved cardiac resynchronization through p-HBP in 93% of this patients (n = 42), with a global success (including those in whom HBP did not correct the BBB) of 78% (n = 42). The basal QRS was 160 ms (151-162) and the paced QRS was 132 ms (125-145). The median of His acute threshold was 1.6 volts (0.9-1.9), stable at one month of follow-up, excluding one patient whose His threshold progressively increased to 5.5 volts. There was no dislocation of leads in the follow-up. LVEF improved in all patients: basal 30% (27-35) and at one month follow-up 52% (48-64). Median fluoroscopy times of device implantation including the time taken for temporary HBP were 8.1 minutes (range 6.1-9.9). There were no relevant complications during the implant or follow-up; all patients showed clinical subjective improvement. Conclusions CRT by p-HBP is feasible and safe in a high percentage of patients, with reasonable times of fluoroscopy, acceptable capture thresholds, and an early improvement in LVEF in patients with HF and an indication for CRT.

P4656Short- and long-term evaluation of safety of cardiac sarcomas radiotherapy

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
C Lestuzzi ◽  
I Cosei ◽  
A Ravasel ◽  
F Navarria ◽  
L Tartuferi ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Multimodal Treatment ◽  
Soft Tissue Sarcomas ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Term Therapy ◽  
Ventricular Ejection Fraction ◽  
Short And Long Term

Abstract Background Primary cardiac sarcomas (PCS) have a dismal prognosis (a reported median survival of 17 months). Complete surgical resection is the mainstay of treatment, but the resection may be incomplete or impossible because of the local extension. Multimodal treatment (MMT) with chemotherapy and radiotherapy (RT) is widely used in soft tissue sarcomas of the extremities, improving survival, and could be considered for PCS. A consequence of the inclusion of the heart in a radiation field, is acute and chronic radiation-induced heart disease (RIHD). New RT techniques, as Intensity Modulated Radiotherapy (IMRT) reduce the risk, focusing the radiation burden to the target neoplasm and limiting the involvement of the cardiac structures. Nevertheless, RT is rarely used in PCS, because the target lesion is inside the heart, and the heart's movement make difficult to avoid the irradiation of the surrounding structures. Purpose Our aim was to report the short and long term clinical and echocardiographic changes in patients (pts) with cardiac sarcomas treated with IMRT. Methods Amongst a group of 33 with PCS seen in our hospitals, we reviewed the data of 20 pts (12 males, 8 females) with PCS treated with local RT. The tumors were left-sided in 10 pts, right-sided in 8 and involved both right and left chambers in 2; fifteen patients had received also anthracyclines chemotherapy (CT). For every patient, we reviewed the clinical data and the echocardiograms performed (as for protocol) before and after CT, before starting RT, weekly during RT and at follow-up (FU), performed every 3 months for 2 years, every 6 months for 3 more years, then yearly. The mean age at diagnosis was 48 years (range 22–72). The FU lasted 2 to 131 months (mean 31, median 14). Five pts are alive 29–85 months (mean 57), after ending therapies, the others died of non-cardiac causes. Results At the end of RT 3 pts had atrial fibrillation (AF), which was cardioverted with Amiodarone, and one had acute pericarditis, treated with non-steroidal anti-inflammatory drugs for one week. Long-term therapy was not needed. The left ventricular ejection fraction (LVEF) was 52% to 70%, decreased by −1% to −10% in 10 pts. At last FU, LVEF ranged from 52 to 75%; it decreased (compared to baseline) by >11% in 1 pt only; global longitudinal LV strain (GLS), available in 8 pts only, was −17%. Amongst the pts with IMRT on the right heart, right ventricular function (evaluated by tricuspid annulus excursion, and right ventricular area shortening fraction) was within normal limits in all both at short and long term FU. There were no cases of constrictive pericarditis or of valvular disease. Conclusion In our experience IMRT for heart sarcomas seems to be relatively safe using modern RT techniques, without evident RIHD at long term follow-up. Larger studies are necessary to further evaluate the safety of RT in the multimodal treatment of cardiac sarcomas.

Septal vs apical defibrillator electrode placement a systematic review

EP Europace ◽  
2021 ◽  
Vol 23 (Supplement_3) ◽  
Author(s):  
H Santos ◽  
I Almeida ◽  
M Santos ◽  
S Paula ◽  
H Miranda ◽  
...  
Keyword(s):  
Ejection Fraction ◽  
Right Ventricular ◽  
Left Ventricular ◽  
Systemic Review ◽  
Left Ventricular Ejection ◽  
Pacing Threshold ◽  
Ventricular Ejection Fraction ◽  
Lead Placement ◽  
Defibrillator Lead

Abstract Funding Acknowledgements Type of funding sources: None. Background The optimal right ventricular defibrillator lead placement is still a debatable matter. We attempt to performed a systemic review to evaluate whether septal and apical placement had significant differences in the follow-up with an indication for implantation of these devices. Objective Review the evidence regarding the efficacy and safety of right ventricular apical and septal defibrillator lead placement. Methods A systemic research on MEDLINE and PUBMED with the term "septal pacing", "apical pacing" "septal defibrillation" or "apical defibrillation". 309 results were identified, however, after a serious analysis, several articles were excluded. Comparisons between apical and septal placement were performed regarding R wave amplitude, pacing threshold at 0.5 ms, lead impedance, left ventricular ejection fraction (LVEF), left ventricular end-diastolic diameter (LVEDD) and lead complication that produced lead re-placement. Mean differences (MD) and confidence interval (CI) was used as a measurement of treatment. Results Six studies were selected, including a total of 2180 patients. The studies were performed with different techniques, analyses and goals. The studies presented heterogeneous and diverse results, with a varied follow-up period, that resulted in the exclusion of one of the studies. Mean age 64.51 years old, 76.86% male, a median ejection fraction of 27.84%, NYHA class of 2.65, ischemic etiologic in 51.10% and a follow-up period of 26.49 months. Septal defibrillator lead placement was established in 772 patients, while the apical defibrillator lead placement was performed in 1399 patients. No differences regarding the lead performance on apical and septal placement were detected regarding the R-wave (MD -0.36, CI -0.75 - +0.03, p = 0.68, I2 = 0%) (reported in 3 studies) and lead impedance (MD -23.83, CI -51.36 - +3.69, p = 0.003, I2 = 82%) (reported in 3 studies). Pacing threshold seems to be favor a septal defibrillator lead implantation (MD -0.05, CI -0.09 - -0.02, p = 0.12, I2 = 53%) (reported in 3 studies). Concerning echocardiography parameters during the follow up period, LVEF (MD -0.83, CI -3.05 - +1.38, p = 0.10, I2 = 57%) (reported in 3 studies) and LVEDD (MD -0.51, CI -2.13 - +1.10, p = 0.20, I2 = 38%) (reported in 3 studies) were not significant influenced for the defibrillator lead placement. Lead complications that provoke a lead replacement was not significant between the lead placement (MD 1.25, CI 0.53 – 2.94, p = 0.71, I2 = 0%) (reported in 3 studies). Conclusions Just pacing threshold proved to improve the septal defibrillator lead placement. Neither the other lead parameters or the echocardiography results during the follow-up were influenced by the lead placement. For a definitive conclusion is important to further investigation.

scholarly journals Feasibility and Outcomes of Upgrading to Left Bundle Branch Pacing in Patients With Pacing-Induced Cardiomyopathy and Infranodal Atrioventricular Block

2021 ◽  
Vol 8 ◽  
Author(s):  
Yang Ye ◽  
Shengjie Wu ◽  
Lan Su ◽  
Xia Sheng ◽  
Jiefang Zhang ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Atrioventricular Block ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Left Ventricular Ejection ◽  
Lv Function ◽  
Pacing Threshold ◽  
Ventricular Ejection Fraction ◽  
Systolic Volume

His bundle pacing (HBP) can reverse left ventricular (LV) remodeling in patients with right ventricular (RV) pacing-induced cardimyopathy (PICM) but may be unable to correct infranodal atrioventricular block (AVB). Left bundle branch pacing (LBBP) results in rapid LV activation and may be able to reliably pace beyond the site of AVB. Our study was conducted to assess the feasibility, safety, and outcomes of permanent LBBP in infranodal AVB and PICM patients. Patients with infranodal AVB and PICM who underwent LBBP for cardiac resynchronization therapy (CRT) were included. Clinical evaluation and echocardiographic and electrocardiographic assessments were recorded at baseline and follow-up. Permanent LBBP upgrade was successful in 19 of 20 patients with a median follow-up duration of 12 months. QRS duration (QRSd) increased from 139.3 ± 28.0 ms at baseline to 176.2 ± 21.4 ms (P &lt; 0.001) with right ventricular pacing (RVP) and was shortened to 120.9 ± 15.2 ms after LBBP (P &lt; 0.001). The mean LBBP threshold was 0.7 ± 0.3 V at 0.4 ms at implant and remained stable during follow-up. The left ventricular ejection fraction (LVEF) increased from 36.3% ± 6.5% to 51.9% ± 13.0% (P &lt; 0.001) with left ventricular end-systolic volume (LVESV) reduced from 180.1 ± 43.5 to 136.8 ± 36.7 ml (P &lt; 0.001) during last follow-up. LBBP paced beyond the site of block, which results in a low pacing threshold with a high success rate in infranodal AVB patients. LBBP improved LV function with stable parameters over the 12 months, making it a reasonable alternative to cardiac resynchronization pacing via a coronary sinus lead in infranodal AVB and PICM patients.

scholarly journals Medium- and Long-Term Lead Stability and Echocardiographic Outcomes of Left Bundle Branch Area Pacing Compared to Right Ventricular Pacing

2021 ◽  
Vol 8 (12) ◽  
pp. 168
Author(s):  
Haojie Zhu ◽  
Zhao Wang ◽  
Xiaofei Li ◽  
Yan Yao ◽  
Zhimin Liu ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Ventricular Pacing ◽  
Ventricular Ejection Fraction ◽  
Right Ventricular Pacing ◽  
Procedural Complications ◽  
Qrs Duration

The long-term lead stability and echocardiographic outcomes of left bundle branch area pacing (LBBAP) are not fully understood. This study aimed to observe the mid-long-term clinical impact of LBBAP compared to right ventricular pacing (RVP). Consecutive bradycardia patients undergoing LBBAP or RVP were enrolled. Pacing and electrophysiological characteristics, echocardiographic measurements, and procedural complications were prospectively recorded at baseline and follow-up. LBBAP was successful in 376 of 406 patients (92.6%), while 313 patients received RVP. During a mean follow-up of 13.6 ± 7.8 months, LBBAP presented with similar pacing parameters and complications to RVP, except a significantly narrower paced QRS duration (115.7 ± 12.3 ms vs. 148.0 ± 18.0 ms, p < 0.001). In 228 patients with ventricular pacing burden >40%, LBBAP at last follow-up resulted in decreased left atrial diameter (LAD) (40.1 ± 8.5 mm vs. 38.5 ± 8.0 mm, p < 0.001) while RVP produced decreased left ventricular ejection fraction (62.7 ± 4.8% vs. 60.5 ± 6.9%, p < 0.001) when compared to baseline. After adjusting for age, the presence of atrial fibrillation, and other clinical factors, LBBAP was still associated with a decrease in LAD (−1.601, 95% CI −3.094–−0.109, p = 0.036). We conclude that LBBAP might result in more preserved echocardiographic outcomes than RVP.

scholarly journals Comparison of the Acute Effects of Different Pacing Sites on Cardiac Synchrony and Contraction Using Speckle-Tracking Echocardiography

2021 ◽  
Vol 8 ◽  
Author(s):  
Huilin Xie ◽  
Xueying Chen ◽  
Yanan Wang ◽  
Yufei Cheng ◽  
Yingjie Zhao ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Speckle Tracking ◽  
Speckle Tracking Echocardiography ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Peak Strain ◽  
Acute Effects ◽  
Ventricular Ejection Fraction ◽  
Mechanical Synchrony ◽  
And Function

Background: Cardiac pacing in patients with bradyarrhythmia may employ variable pacing sites, which may have different effects on cardiac function. Left bundle branch pacing (LBBP) is a new physiological pacing modality, and the acute outcomes on cardiac mechanical synchrony during LBBP remain uncertain. We evaluated the acute effects of four pacing sites on cardiac synchrony and contraction using speckle-tracking echocardiography, and comparisons among four different pacing sites were rare.Methods: We enrolled 21 patients with atrioventricular block or sick sinus syndrome who each sequentially underwent acute pacing protocols, including right ventricular apical pacing (RVAP), right ventricular outflow tract pacing (RVOP), His bundle pacing (HBP), and left bundle branch pacing (LBBP). Electrocardiograms and echocardiograms were recorded at baseline and during pacing. The interventricular mechanical delay (IVMD), the standard deviation of the times to longitudinal peak strain during 17 segments (PSD), and the Yu index were used to evaluate ventricular mechanical synchrony. Layer-specific strain was computed using two-dimensional speckle tracking technique to provide in-depth details about ventricular synchrony and function.Results: Left ventricular ejection fraction (LVEF) and tricuspid annulus plane systolic excursion (TAPSE) were significantly decreased during RVAP and RVOP but were not significantly different during HBP and LBBP compared with baseline. RVAP and RVOP significantly prolonged QRS duration, whereas HBP and LBBP showed non-significant effects. IVMD and PSD were significantly increased during RVAP but were not significantly different during RVOP, HBP, or LBBP. LBBP resulted in a significant improvement in the IVMD and Yu index compared with RVAP. No significant differences in mechanical synchrony were found between HBP and LBBP.Conclusion: Among these pacing modalities, RVAP has a negative acute impact on cardiac synchrony and contraction. HBP and LBBP best preserve physiological cardiac synchrony and function.

P5694Outcomes of patients with arrhythmogenic right ventricular cardiomyopathy after ventricular tachycardia ablation without an implantable cardioverter-defibrillator: a multicenter international study

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
E Gandjbakhch ◽  
M Laredo ◽  
A Berruezo ◽  
J B Gourraud ◽  
R Martins ◽  
...  
Keyword(s):  
Ventricular Tachycardia ◽  
Left Ventricular Ejection Fraction ◽  
Ejection Fraction ◽  
Right Ventricular ◽  
Arrhythmogenic Right Ventricular Cardiomyopathy ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Ventricular Cardiomyopathy ◽  
Ventricular Ejection Fraction

Abstract Background In arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D), implantable cardioverter-defibrillators (ICD) after an episode of sustained monomorphic ventricular tachycardia (MVT) are currently recommended in most situations. However, radiofrequency catheter ablation (RCA) is effective in reducing recurrent VT and whether MVT is a surrogate of sudden cardiac death is debated when other risk factors are lacking. Purpose To report the outcomes of patients with ARVC/D who underwent RCA of well-tolerated MVT without a back-up ICD. Methods Patients with a definite ARVC/D diagnosis according to the 2010 Task Force revised criteria who underwent RCA of well-tolerated MVT at 9 tertiary centers across 5 countries, without an ICD prior to RCA and in the 3 following months were retrospectively included. Patients presenting with syncope or electrical storm, and patients with left ventricular ejection fraction <50% were excluded. Similar patients implanted with an ICD prior or without RCA in the same period served as controls. Results Sixty-five patients [median age 46.1 years, range (19.5–73.8), 75% males] underwent RCA of MVT between 2003 and 2016. Familial history of ARVC/D was found in 11% of patients. Epsilon-waves were present in 19% and T-waves inversion beyond V2 in 43%. A right ventricular (RV) ejection fraction ≤40% or fractional area change ≤33% was found in 14 (25%) patients. Median left ventricular ejection fraction was 61% (50–70). Clinical presentation was palpitations in 81% of patients and near-syncope in 14%. Prior to RCA, patients were on beta-blockers alone in 18%, class I drugs in 37% and amiodarone in 9%, while 15% of patients were free any antiarrhythmic medication. Only 1 patient (2%) had >1 clinical VT morphology. Median VT rate was 180 (110–270). An epicardial approach was used in 31% patients. The clinical VT was inducible in 84% of patients. The median number of targeted RV site was 1 (1–3) (RV outflow tract in 72%). Full acute success defined inability to induce any VT was achieved in 72% of patients. During a median follow-up time of 49 month (1.4–162), there was no death or aborted cardiac arrest. Survival without VT recurrence was estimated at 82%, 71% and 60%, 12-, 36- and 60-months after RCA. No VT recurrence was observed among patient who had undergone an epicardial ablation. Among patients with VT recurrence, 6 (35%) did not receive an ICD, and 14 (70%) underwent redo RCA. An ICD was implanted in 10 patients, including 5 for VT recurrence. Fifty-eight patients constituted the control group, and 64% had appropriate ICD interventions during follow-up. Conclusions Despite a significant rate of VT recurrence, selected patients with ARVC/D who underwent RCA for stable MVT without an ICD did not experience any arrhythmic death. Further prospective studies are mandatory to precise the respective places of ICD and RCA in the management of ARVC/D patients with well-tolerated MVT. Acknowledgement/Funding None

Sign in / Sign up

Export Citation Format

Share Document