Cardiac resynchronization therapy: Optimization and follow-up

2021 ◽  
pp. 587-597
Author(s):  
Marta Sitges ◽  
Erwan Donal
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Imaging Techniques ◽  
Biventricular Pacing ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Functional Mitral Regurgitation ◽  
Cardiac Imaging Techniques ◽  
Resynchronization Therapy

Cardiac imaging techniques have an important role in the follow-up of patients undergoing cardiac resynchronization therapy (CRT) as they provide objective evidence of changes in cardiac dimensions and function. The role of echocardiography is well established in the assessment of left ventricular reverse remodelling and the evaluation of secondary (functional) mitral regurgitation. Additionally, echocardiography might be used for optimizing the programming of atrioventricular (AV) and interventricular (VV) delays of current CRT devices. Acute benefit from this optimization has been demonstrated, but longer follow-up studies have failed to show a clear benefit of optimized CRT on top of simultaneous biventricular pacing on the outcome of patients with CRT. This chapter reviews the role of imaging in assessing follow-up and outcome of patients undergoing CRT as well as the rationale, the methods used, and the clinical impact of optimization of the programming of CRT devices.

Cardiac resynchronization therapy: optimization and follow-up

2015 ◽  
pp. 420-431
Author(s):  
Marta Sitges ◽  
Genevieve Derumeaux
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Imaging Techniques ◽  
Biventricular Pacing ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Functional Mitral Regurgitation ◽  
Cardiac Imaging Techniques ◽  
Resynchronization Therapy

Cardiac imaging techniques have an important role in the follow-up of patients undergoing cardiac resynchronization therapy (CRT) as they provide objective evidence of changes in cardiac dimensions and function. The role of echocardiography is well established in the assessment of left ventricular reverse remodelling and the evaluation of secondary (functional) mitral regurgitation. Additionally, echocardiography might be used for optimizing the programming of atrio-ventricular (AV) and inter-ventricular (VV) delays of current CRT devices. Acute benefits from this optimization have been demonstrated, but longer follow-up studies have failed to show a clear benefit of optimized CRT on top of simultaneous biventricular pacing on the outcome of patients with CRT. This chapter reviews the role of imaging in assessing follow-up and outcome of patients undergoing CRT, as well as the rationale, the methods used, and the clinical impact of optimization of the programming of CRT devices.

Biventricular pacing-induced acute response in baroreflex sensitivity has predictive value for midterm response to cardiac resynchronization therapy

2009 ◽  
Vol 297 (1) ◽  
pp. H233-H237 ◽  
Author(s):  
Maaike G. J. Gademan ◽  
Rutger J. van Bommel ◽  
C. Jan Willem Borleffs ◽  
SumChe Man ◽  
Joris C. W. Haest ◽  
...  
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Predictive Value ◽  
Baroreflex Sensitivity ◽  
Biventricular Pacing ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Arterial Baroreflex ◽  
Resynchronization Therapy ◽  
Acute Response

In a previous study we demonstrated that the institution of biventricular pacing in chronic heart failure (CHF) acutely facilitates the arterial baroreflex. The arterial baroreflex has important prognostic value in CHF. We hypothesized that the acute response in baroreflex sensitivity (BRS) after the institution of cardiac resynchronization therapy (CRT) has predictive value for midterm response. One day after implantation of a CRT device in 33 CHF patients (27 male/6 female; age, 66.5 ± 9.5 yr; left ventricular ejection fraction, 28 ± 7%) we measured noninvasive BRS and heart rate variability (HRV) in two conditions: CRT device switched on and switched off (on/off order randomized). Echocardiography was performed before implantation (baseline) and 6 mo after implantation (follow-up). CRT responders were defined as patients in whom left ventricular end-systolic volume at follow-up had decreased by ≥15%. Responders (69.7%) and nonresponders (30.3%) had similar baseline characteristics. In responders, CRT increased BRS by 30% ( P = 0.03); this differed significantly ( P = 0.02) from the average BRS change (−2%) in the nonresponders. CRT also increased HRV by 30% in responders ( P = 0.02), but there was no significant difference found compared with the increase in HRV (8%) in the nonresponders. Receiver-operating characteristic curve analysis revealed that the percent BRS increase had predictive value for the discrimination of responders and nonresponders (area under the curve, 0.69; 95% confidence interval, 0.51–0.87; maximal accuracy, 0.70). Our study demonstrates that a CRT-induced acute BRS increase has predictive value for the echocardiographic response to CRT. This finding suggests that the autonomic nervous system is actively involved in CRT-related reverse remodeling.

scholarly journals Very Long-Term Follow-Up in Cardiac Resynchronization Therapy: Wider Paced QRS Equals Worse Prognosis

2021 ◽  
Vol 11 (11) ◽  
pp. 1176
Author(s):  
Patrick Leitz ◽  
Julia Köbe ◽  
Benjamin Rath ◽  
Florian Reinke ◽  
Gerrit Frommeyer ◽  
...  
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Clinical Response ◽  
Biventricular Pacing ◽  
Nyha Class ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Resynchronization Therapy ◽  
Long Term Follow Up

Background: Different electrocardiogram (ECG) findings are known to be independent predictors of clinical response to cardiac resynchronization therapy (CRT). It remains unknown how these findings influence very long-term prognosis. Methods and Results: A total of 102 consecutive patients (75 males, mean age 65 ± 10 years) referred to our center for CRT implantation had previously been included in this prospective observational study. The same patient group was now re-evaluated for death from all causes over a prolonged median follow-up of 10.3 years (interquartile range 9.4–12.5 years). During follow-up, 55 patients died, and 82% of the clinical non-responders (n = 23) and 44% of the responders (n = 79) were deceased. We screened for univariate associations and found QRS width during biventricular (BIV) pacing (p = 0.02), left ventricular (LV) pacing (p < 0.01), Δ LV paced–right ventricular (RV) paced (p = 0.03), age (p = 0.03), New York Heart Association (NYHA) class (p < 0.01), CHA2DS2-Vasc score (p < 0.01), glomerular filtration rate (p < 0.01), coronary artery disease (p < 0.01), non-ischemic cardiomyopathy (NICM) (p = 0.01), arterial hypertension (p < 0.01), NT-proBNP (p < 0.01), and clinical response to CRT (p < 0.01) to be significantly associated with mortality. In the multivariate analysis, NICM, the lower NYHA class, and smaller QRS width during BIV pacing were independent predictors of better outcomes. Conclusion: Our data show that QRS width duration during biventricular pacing, an ECG parameter easily obtainable during LV lead placement, is an independent predictor of mortality in a long-term follow-up. Our data add further evidence that NICM and lower NYHA class are independent predictors for better outcome after CRT implantation.

Effect of cardiac resynchronization therapy on quality of life: Role of hypertension

2018 ◽  
pp. 1-6
Keyword(s):  
Quality Of Life ◽  
Heart Failure ◽  
Cardiac Resynchronization Therapy ◽  
Interventricular Septum ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Resynchronization Therapy

Aims: To evaluate cardiac function, quality of life and role of hypertension in symptomatic heart failure in patients with Cardiac Resynchronization Therapy (CRT). Methods: 80 patients with heart failure were enrolled in our study. Among them 30 patients underwent CRT implantation (CRT group) and 50 patients received optimal medical therapy only (non-CRT group). Follow-up was carried out for 20 ± 2.828 months. Assessment of New York Hear Association (NYHA) class, QRS width, Ejection Fraction (EF), left ventricular end diastolic diameter, left ventricular end systolic diameter, interventricular septum, posterior wall thickness, degree of Mitral Regurgitation (MR) and Basic Natriuretic Peptide (BNP) level was performed at baseline and follow-up along with number of admissions and Quality of Life (QOL) assessment. Results: The baseline indices of patients in the CRT and non-CRT groups were statistically same (P>0.05). At the end of follow-up most indices showed significant improvement in the CRT group (P<0.05) except thickness of IVS and the PWT (P>0.05). The indices in the non-CRT group only showed significant improvement in EF and BNP level (P<0.05). Hypertensive patients did not show significant impact on number of admissions and QOL (P<0.05). Conclusions: Patients receiving CRT had an overall improved outcome with beneficial effects in cardiac remodeling, enhancing the left ventricular function and improving the quality of life. Hypertension was associated with poorer outcome

scholarly journals Analysis of Risk Factors for Acute Heart Failure in Patients with Dilated Cardiomyopathy and Persistent Severe Functional Mitral Regurgitation Despite Cardiac Resynchronization Therapy

2020 ◽  
pp. 35-39
Author(s):  
R. V. Buriak ◽  
K. V. Rudenko ◽  
O. A. Krykunov
Keyword(s):  
Risk Factors ◽  
Heart Failure ◽  
Mitral Regurgitation ◽  
Cardiac Resynchronization Therapy ◽  
Dilated Cardiomyopathy ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Functional Mitral Regurgitation ◽  
Reverse Remodeling ◽  
Resynchronization Therapy

Congestive heart failure resulting from non-ischemic dilated cardiomyopathy (DCM) with secondary functional mitral regurgitation (FMR) is associated with poor prognosis. Medical treatment results in a 1-year survival of 52% to 87% and a 5-year survival of 22% to 54%, with highest survivals observed in more recent years, probably reflecting improvements in medical therapy. Non-surgical interventions involve cardiac resynchronization therapy. In addition to medical treatment, cardiac resynchronization therapy (CRT) should be considered in patients with New York Heart Association (NYHA) class II– IV HF, left ventricular ejection fraction (LVEF) =35%, normal sinus rhythm and left bundle branch block with QRS >150 ms. In these patients, CRT can also facilitate left ventricular (LV) reverse remodeling and reduce associated FMR. The aim of this study was to investigate the features of symptomatology and to analyze the risk factors for acute heart failure (AHF) in patients with DCM and persistent severe functional mitral regurgitation despite CRT and optimal guideline-directed medical therapy (GDMT). Materials and methods. After providing informed consent, 144 patients with severe FMR were involved in the study. Concomitant tricuspid valve regurgitation was registered in 142 (98.6%) cases. The median LVEF was 27.0 (23.0-31.6)%. 40 (27.8%) patients had a permanent form of atrial fibrillation, and 24 (16.7%) patients had a first-degree atrioventricular node block. The median NT-proBNP was 2600 (2133-3200) pg/ml, indicating the presence of severe chronic heart failure. Results. The median term after CRT device implantation was 36 (3.5-60) months. A comparative analysis between DCM patients with and without CRT revealed statistically significant differences between clinical characteristics, namely: age (p=0.020), lower heart rate (p=0.004), lower hemoglobin (p=0.017), higher erythrocyte sedimentation rate (ESR) (p=0.000) and more frequent AHF at the hospital stage (p=0.030). The incidence of AHF at the hospital stage was 13.8% in patients with CRT and 3.5% in those without CRT. The calculated odds ratio of AHF was 4.44 (95% confidence interval (CI) 1.039-18.971), and the relative risk of AHF was 3.966 (95% CI 1.054-14.915). Discussion. FMR has been reported to persist in about 20% to 25% of CRT patients and, in an additional 10% to 15%, it may actually worsen after CRT. In this subset of CRT non-responders, reduced reverse remodeling, increased morbidity, and increased mortality have been reported compared with CRT patients in whom FMR was significantly reduced or abolished. Conclusions. The results of our study demonstrate that severe functional mitral regurgitation despite cardiac resynchronization therapy in patients with dilated cardiomyopathy is a significant risk factor for AHF and subsequent hospitalizations for heart failure.

Abstract 1604: Response to Cardiac Resynchronization Therapy Differs Between Patients With and Without Previous Right Ventricular Pacing

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Andrea M Thelen ◽  
Christopher L Kaufman ◽  
Kevin V Burns ◽  
Daniel R Kaiser ◽  
Aaron S Kelly ◽  
...  
Keyword(s):  
Heart Failure ◽  
Cardiac Resynchronization Therapy ◽  
Systolic Function ◽  
Radial Strain ◽  
Left Ventricular ◽  
Doppler Imaging ◽  
Cardiac Resynchronization ◽  
Resynchronization Therapy ◽  
Peak Displacement

Background: Previous large studies on the effects of cardiac resynchronization therapy (CRT) in patients with heart failure have generally excluded patients previously paced from the right ventricle (RV). Previously RV paced patients (RVp) can exhibit an iatrogenic cause of dyssynchrony and reduced systolic function and thus, may respond differently to CRT than patients not previously RV paced (nRVp). The purpose of this study was to test the hypothesis that RVp patients have greater improvements in left ventricular systolic function, volumes, and dyssynchrony in response to CRT than nRVp. Methods: Standard echocardiograms with tissue Doppler imaging were performed before and after chronic CRT in RVp (n = 21, 16 male) and nRVp (n = 70, 54 male) heart failure patients. Ejection fraction (EF), left ventricular end diastolic (LVEDV) and systolic (LVESV) volumes were calculated using the biplane Simpson’s method. Longitudinal dyssynchrony was calculated as the standard deviation of time to peak displacement (TT-12) of 12 segments in the apical views. Using mid-ventricular short axis views and speckle-tracking methods, radial dyssynchrony (Rad dys ) was calculated as the maximal time difference between six myocardial segments for peak radial strain. Echo response was defined as ≥ 15% reduction in LVESV. Results are reported as mean ± SD. Results: Significant baseline differences (p < 0.05) were observed between groups (RVp vs. nRVp) for age (74 ± 13 vs. 67 ± 13 year), follow-up time (6.1 ± 1.8 vs. 4.6 ± 2.1 months), LVEDV (154.3±50.8 vs.185.3±56.9 mL), and a trend for LVESV (112.4 ± 40.6 vs. 134.9 ± 47 mL, p = 0 .05). No differences were observed for EF, etiology of heart failure, and dyssynchrony measures between groups at baseline. Echo response rate was significantly ( p < 0.05) greater in RVp (76%) than nRVp (57%). After adjusting for baseline differences, RVp had greater improvement in EF (14 ± 9 vs. 8 ± 7%, p < 0.05) and LVESV (−33 ± 18 vs. −20 ± 21%, p < 0.05). After adjustment for follow-up time, no difference was observed for change in dyssynchrony between groups. Conclusion: RVp patients upgraded to CRT exhibit greater improvements in systolic function and ventricular remodeling as compared to nRVp patients.

P3805Mortality predictors and outcome in patients after upgrade from implantable cardioverter-defibrillator to cardiac resynchronization therapy in comparison to CRT-D de novo implantation

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
E Jedrzejczyk-Patej ◽  
M Mazurek ◽  
W Kowalska ◽  
M Bugajski ◽  
A Konieczny-Kozielska ◽  
...  
Keyword(s):  
Infective Endocarditis ◽  
Cardiac Resynchronization Therapy ◽  
Implantable Cardioverter Defibrillator ◽  
De Novo ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Resynchronization Therapy ◽  
Cardioverter Defibrillator ◽  
Mortality Predictors

Abstract Background Over a quarter of all cardiac resynchronization therapy (CRT) implants are upgrades from previous devices, mainly from implantable cardioverter-defibrillator (ICD). In comparison to CRT with defibrillator (CRT-D) de novo implantation, upgrade from ICD to CRT-D carries higher risk of complications. Limited number of studies evaluated predictors of death in patients undergoing upgrade from ICD to CRT-D. Aim To determine mortality predictors and outcome in patients undergoing upgrade from ICD to CRT-D in comparison to subjects with CRT-D de novo implantation. Methods Study population consisted of 595 consecutive patients with CRT-D implanted between 2002 and 2015 in tertiary care university hospital, in a densely inhabited, urban region of Poland (480 subjects [84.3%] with CRT-D de novo implantation; 115 patients [15.7%] upgraded from ICD to CRT-D). Results The median follow-up was 1692 days (range: 457–3067). All-cause mortality in patients upgraded from ICD was significantly higher than in subjects with CRT-D implanted de novo (43.5% vs. 35.5%, P=0.045). On multivariable regression analysis, left ventricular end-systolic diameter (HR 1.07, 95% CI 1.02–1.11, P=0.002), creatinine level at baseline (HR 1.01, 95% CI 1.00–1.02, P=0.01), NYHA IV class at baseline (HR 2.36, 95% CI 1.00–5.53, P=0.049) and cardiac device-related infective endocarditis (CDRIE) during follow up (HR 2.42, 95% CI 1.02–5.75, P=0.046) were identified as independent predictors of higher mortality in patients with CRT-D upgraded from ICD. Conclusions Mortality rate in patients upgraded from ICD is higher in comparison to CRT-D de novo implanted subjects, and reaches almost 45% within 4.5 years. Left ventricular dimensions, creatinine level, high NYHA class at baseline and infective endocarditis during follow up are independent mortality predictors in patients with CRT-D upgraded from ICD.

P4531Early and late superresponse to cardiac resynchronization therapy

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
V A Kuznetsov ◽  
T N Enina ◽  
A M Soldatova ◽  
T I Petelina ◽  
N E Shirokov ◽  
...  
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Reverse Remodeling ◽  
Resynchronization Therapy ◽  
Tnf Α ◽  
Echocardiographic Parameters ◽  
Group 2 ◽  
Group 1

Abstract Background Superresponders to cardiac resynchronization therapy (CRT) demonstrate significant reverse remodeling, improvement in cardiac function, decrease in inflammatory mediators and markers of cardiac fibrosis. It is not clear if superresponse (SR) can be early or late and if the time of SR to CRT is associated with different degree of biochemical improvement. Aim To assess structural and functional heart parameters, sympathetic activity, levels of biomarkers of myocardial fibrosis, inflammatory and neurohormonal mediators in patients with various time of SR to CRT. Methods The study enrolled 82 superresponders to CRT (decrease in left ventricular end-systolic volume (LVESV) >30%) (mean age 60.4±9.3 years; 80.5% men, 19.5% women; 54.9% with ischemic etiology of heart failure). Patients were divided into two groups: group 1 (n=19) – SR was achieved within 24 months (14.0 [8.0; 21.0] months); group 2 (n=63) - SR was achieved after 24 months (59 [43.0; 84.0] months). Echocardiographic parameters, plasma levels of epinephrine, norepinephrine, NT-proBNP, interleukin (IL) 1β, IL-6, IL-10, tumor necrosis factor alpha (TNF-α), metalloproteinase (MMP) 9, tissue inhibitors of metalloproteinase (TIMP) 1 and 4 were evaluated. Results At baseline there were no differences in demographic, clinical and echocardiographic characteristics between the groups. Levels of epinephrine (1.1 [0.1; 2.2] ng/ml vs 2.1 [0.7; 3.4] ng/ml; p=0.049) and IL-10 (1.8 [1.5; 3.5] pg/ml vs 3.9 [2.7; 5.1] pg/ml; p=0.019) were significantly higher in group 2. Both groups demonstrated significant improvement in echocardiographic parameters. On follow-up left ventricular (LV) end-systolic dimension (p=0.041), LV end-diastolic dimension (p=0.049), LVESV (p=0.014), LV end-diastolic volume (p=0.045) were lower in group 2. In group 1 IL-6 (p=0.047), TNF-α (p=0.047) decreased significantly and there was a tendency for IL-1β (p=0.064) and norepinephrine (p=0.069) levels to increase. In group 2 levels of IL-1β (p<0.001), IL-6 (p=0.030), IL-10 (p=0.003), TNF-α (p<0.001), TIMP-1 (p=0.010) and epinephrine (p=0.024) decreased significantly while MMP-9/TIMP-1 (p=0.023) increased as compared to baseline levels. Additionally there was a tendency for NT-proBNP level to decrease in group 2 (p=0.069). Follow-up level of norepinephrine (7.8 [2.9; 17.2] ng/ml vs 1.1 [0.2; 8.7] ng/ml; p=0.011 was lower and MMP-9/TIMP-4 level was higher (0.058 [0.044; 0.091] vs 0.092 [0.064; 0.111]; p=0.013) in group 2. Diverse trends were observed in IL-10 (0.4 [−0.6; 1.2] pg/ml in group 1 vs −2.3 [−3.4; −0.5] pg/ml in group 2; p=0.007) and norepinephrine (4.0 [−5.2; 14.3] ng/ml in the group 1 vs −1.2 [−11.6; 4.0] ng/ml in the group 2; p=0.015) between the groups. Conclusion CRT modulates sympathetic, neurohumoral, immune and fibrotic activity. Late SR to CRT is associated with decrease of sympathetic and inflammatory activity and more pronounced LV reverse remodeling.

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