scholarly journals RIGHT VENTRICULAR OUTFLOW TRACT PACING LEADS TO BETTER LEFT VENTRICULAR STRAIN MECHANICS THAN CONVENTIONAL RIGHT HEART PACING: A STUDY IN OPEN-CHEST PIGS

2011 ◽  
Vol 57 (14) ◽  
pp. E168
Author(s):  
David J. Sahn ◽  
Zhiwen Zhou ◽  
Ya-Wei Xu ◽  
Li Xiong ◽  
Muhammad Ashraf ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Right Heart ◽  
Left Ventricular Strain ◽  
Open Chest ◽  
Pacing Leads

scholarly journals P180 Pulmonary valve stenosis and pulmonary trunk aneurysm in old female with syncope

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
C Fiore ◽  
A M F Ali ◽  
T Kemaloglu Oz ◽  
G Cagnazzo ◽  
M Melone ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Pulmonary Valve ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Pulmonary Trunk ◽  
Aortic Aneurysms ◽  
Heart Team ◽  
The Right

Abstract A 77-year-old female, known hypertensive and dyslipidemic on treatment presented with three episodes of syncope in the last two months. On examination; there was grade 4/6 harsh systolic murmur on the lateral sternal border. Transthoracic echocardiography was difficult because of mesocardia and abnormal rotation of the heart due to enlarged right sided chambers. There is mild left ventricular hypertrophy with normal ejection fraction, no left sided valvular disease. The right ventricle was hypertrophied and dilated with normal RV function. The pulmonary valve was thickened with significant systolic flow aliasing through the valve with significant regurgitation and huge main pulmonary trunk aneurysm (59 mm at its wideset diameter) (Figure 1). Transthoracic approach did not allow a correct alignment of the Doppler CW and the correct estimate of pulmonary valvulopathy; TEE was performed with a correct visualization of the valve in deep transgastric projection at 90 degrees. The valve was thickened, fibrotic, degenerated with systolic doming of leaflets (Figure 2) and peak systolic gradient ∼ 70 mmHg (Figure 3). 3D reconstruction of the valve showed a tricuspid valve (Figure 4) with a valve area ∼ 0.9 cm2 using planimetry in MPR (Figure 5). CT scan was performed which confirmed the main pulmonary trunk aneurysm ∼ 60 mm (Figure 6). Therefore, in light of the clinical and instrumental picture, the patient was referred to heart team discussion for the plan of surgical intervention. Discussion According to the ESC guidelines for grown up congenital heart disease in 2010, this pulmonary valve should be intervened upon as it is severe symptomatic PS (1), but there are 2 problems with this case; the first is significant associated PR, so no place for balloon dilatation here, the second problem is the pulmonary artery aneurysm (PAA). The dilemma of management of pulmonary PAA is that all the available data are about aortic aneurysms. Indications for intervention for PAA include: Absolute PAA diameter ≥ 5.5 cm, Increase in the diameter of the aneurysm of ≥ 0.5 cm in 6 mo, Compression of adjacent structures, Thrombus formation in the aneurysm sack, Evidence of valvular pathologies or shunt flow Verification of PAH, Signs of rupture or dissection (2). Surgery could include: Aneurysmorrhaphy only decreases the diameter of the vessel (3). Aneurysmectomy and repair or replacement of the right ventricular outflow tract is commonly used technique recently and mostly suits connective tissue disorders (6). Also, Replacement of the PA and the pulmonary trunk with a conduit (Gore-Tex or Dacron tubes, homografts, or xenografts) starting in the right ventricular outflow tract with replacement of the pulmonary valve (4). Conclusion PAA management is currently challenging because there are no clear guidelines on its optimal treatment. The presence of significant pulmonary valve dysfunction could affect the decision making of the associated PAA management. Abstract P180 Figure.

scholarly journals Right Ventricular Outflow Tract Tachycardia with Structural Abnormalities of the Right Ventricle and Left Ventricular Diverticulum

2015 ◽  
Vol 2015 ◽  
pp. 1-3
Author(s):  
Bortolo Martini ◽  
Nicola Trevisi ◽  
Nicolò Martini ◽  
Li Zhang
Keyword(s):  
Right Ventricle ◽  
Right Ventricular ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Ventricular Diverticulum ◽  
Right Ventricular Wall ◽  
Left Ventricular Diverticulum ◽  
The Right

A 43-year-old woman presented to the emergency room with a sustained ventricular tachycardia (VT). ECG showed a QRS in left bundle branch block morphology with inferior axis. Echocardiography, ventricular angiography, and cardiac magnetic resonance imaging (CMRI) revealed a normal right ventricle and a left ventricular diverticulum. Electrophysiology studies with epicardial voltage mapping identified a large fibrotic area in the inferolateral layer of the right ventricular wall and a small area of fibrotic tissue at the anterior right ventricular outflow tract. VT ablation was successfully performed with combined epicardial and endocardial approaches.

scholarly journals Left bundle branch pacing: efficacy and safety compared to right ventricular outflow tract pacing

EP Europace ◽  
2021 ◽  
Vol 23 (Supplement_3) ◽  
Author(s):  
A Riano Ondiviela ◽  
M Cabrera Ramos ◽  
JR Ruiz Arroyo ◽  
J Ramos Maqueda
Keyword(s):  
Right Ventricular ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Left Ventricular Ejection ◽  
Pacing Threshold ◽  
Ventricular Ejection Fraction ◽  
Ventricular Lead ◽  
Qrs Duration

Abstract Funding Acknowledgements Type of funding sources: None. Introduction Patients with preserved left ventricular ejection fraction (LVEF) and atrioventricular block (AVB) who are anticipated for high-burden of right ventricular (RV) pacing possess a risk to develop pacing-induced cardiomyopathy and adverse clinical outcomes. Left bundle branch pacing (LBBP) has recently emerged as a mode of conduction system pacing in the quest for physiological pacing. Purpose The aim of our study was to assess LBBP feasibility and safety compared to right ventricular outflow tract pacing (RVOTP). Methods Single centre randomized clinical trial to investigate acute success, feasibility and safety of LBBP versus RVOTP. May to October 2020. Patients with pacemaker indication and preserved LVEF were randomized 1:1 and followed up 3 months. Success was defined in LBBP group as a paced ECG < 120ms or with a 20% length reduction from the basal ECG. Results 120 patients were randomized, 60 in each group, 61% males. The mean age was 77,9 ± 9 years and third-degree AVB was the main pacing indication. The procedure was successful in 95% of the cases in both groups (p = 1). The paced QRS interval was narrower in the LBBP group compared to the RVOT group (99 ± 2 ms vs 113,6 ± 11,7 ms, p < 0,001). Lower fluoroscopy times were achieved in LBBP group (3.1 ± 2.1 min vs 4.3 ± 3.4, p = 0,035) and also longer procedure times in LBBP group (68,9 ± 36,9 min vs 44,3 ± 18,7 min, p < 0,001). No complications were achieved and no difference in ventricular lead dislocation was found between both groups (1.6% vs 1.6%)(p = 1). Conclusions LBBP is feasible, safe and provides a narrower paced QRS compared to RVOTP. LBBP required lower fluoroscopy times but longer procedure times compared to RVOTP. LBBP (n = 60) RVOTP (n = 60) p Age (mean ± SD) 76,7 ± 9 79,7 ± 8 0,067 Male gender 62 (37) 60 (36) 1 Successful procedure 95 (57) 95 (57) 1 Basal left bundle branch block 15 (9) 13 (8) Basal QRS duration (mean ± SD) 112,6 ± 29,6 109,9 ± 25,8 0,59 Pacing QRS duration (min)(mean ± SD) 99 ± 2 139,6 ± 11,7 < 0,001 Procedure time (min) (mean ± SD) 68,9 ± 36,9 44,3 ± 18,7 < 0,001 Fuoroscopy time (min)(mean ± SD) 3.1 ± 2.1 4.3 ± 3.4 0,035 R wave (mV)(mean ± SD) 9,9 ± 5,7 9,9 ± 5 0,98 Right ventricle pacing threshold (V)(mean ± SD) 0,67 ± 0,3 0,58 ± 0,24 0,08 Ventricular lead dislocation 1.6 (1) 1.6 (1) 1

Melody Transcatheter Pulmonary Valve Placement in a HeartMate II Patient

2017 ◽  
Vol 11 (4) ◽  
pp. NP34-NP36
Author(s):  
Tabitha G. Moe ◽  
Linda Staley ◽  
Joseph N. Graziano
Keyword(s):  
Right Ventricular ◽  
Pulmonary Valve ◽  
Right Ventricular Outflow Tract ◽  
Evaluation Process ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Circulatory Support ◽  
Close Monitoring ◽  
Valve Placement

Transcatheter pulmonary valve placement is emerging as a standard therapy for dysfunctional right ventricular outflow tract conduits. The Melody transcatheter pulmonary valve is indicated for use in the management of pediatric and adult patients with right ventricular outflow tract conduits measuring at least 16 mm in diameter. This is the first reported case of placement in a patient with a left ventricular assist device. We outline the preprocedural evaluation process, the procedural methods, and the outcomes of a successful implantation in a complex patient. With a team-based approach including thoughtful preprocedural evaluation, and close monitoring, successful deployment of a transcatheter pulmonary valve is possible in complex patients in the setting of mechanical circulatory support.

scholarly journals 113 Echocardiographic assessment of right ventricular outflow tract obstruction in hypertrophic cardiomyopathy - efficacy of dual chamber pacing in reducing of gradient

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
A Wojtkowska ◽  
R Zarczuk ◽  
W Brzozowski ◽  
S Lukasik ◽  
M Tomaszewski ◽  
...  
Keyword(s):  
Right Ventricle ◽  
Right Ventricular ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Ventricular Outflow Tract Obstruction ◽  
Spectral Doppler ◽  
The Right ◽  
Av Delay

Abstract Hypertrophy of the right ventricle (RV) in the course of hypertrophic cardiomyopathy (HCM) is found in 30-60% of cases, with the possibility of a right ventricular outflow tract obstruction (RVOTO), obstruction in the apex or the middle part of the right ventricle. A patient, aged 41, admitted due to limitation of exercise tolerance, effort dyspnea, presyncope. In an echocardiogram, interventricular septum (IVS) hypertrophy was observed up to 2.0 cm; normal size of the heart cavities; normal left ventricular systolic function (EF-70%). A color doppler mapping detected the zone of flow acceleraction and turbulent flow in right ventricular outflow tract (RVOT), next a spectral doppler examination showed the RVOT obstruction with a maximal gradient of 64 mmHg. Because of the suboptimal echocardiographic imaging, a heart CT scan was performed, revealing the features of left ventricular hypertrophy, most severe at the base and the medium part of IVS (up to 25 mm). Asymmetric hypertrophy of the middle portion of the right ventricle and right ventricular outflow tract obstruction was also observed. A hemodynamic study confirmed the presence of gradient in RVOT, up to 40 mmHg. Holter electrocardiogram recorded an episode of non-sustained ventricular tachycardia. Taking into account the clinical picture, the family history of the disease, and calculated HCM Risk SCD (7.55%), the decision was made to implant a dual chamber cardioverter defibrillator. The defibrillator electrode was fixed at the apex of the right ventricle. A short AV delay was programmed for prevalent right ventricular stimulation (AV delay 100 ms), resulting in 99.6% ventricular stimulation. The control echocardiogram showed a reduction in the maximum gradient in RVOT to 24 mmHg. In addition, the patient was treated with a beta-blocker. To sum up, in the case of HCM we should always examine the RV with color and spectral doppler to exclude potential narrowing in RV. Constant AV sequential stimulation with a short AV delay is a recognized method that can be considered in symptomatic adult HCM patients with a left ventricular outflow tract obstruction. In the case described here, the above mentioned method proved effective in the significant reduction of the gradient in the right ventricular outflow tract. Abstract 113 Figure. gradient in RVOT

scholarly journals The Clinical Manifestation of Straight Back Syndrome in Echocardiogram Performance

2021 ◽  
Author(s):  
Wanqian Yu ◽  
Hongzhou Zhang ◽  
Pingping Yang ◽  
Lujin Gan ◽  
Chenxi Wang ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Supine Position ◽  
Left Ventricular Outflow Tract ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Standing Position ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Left Ventricular Outflow ◽  
Experimental Group

Abstract Background: There were no studies on the mechanism of clinical manifestations of straight back syndrome. Our aim was to explore the mechanism of clinical symptoms of straight back syndrome.Methods: From February 2018 to February 2021, we included 4 patients (3 males and 1 female) with straight back syndrome as the experimental group, and 4 normal people matched with sex and BMI as the normal control group. Basic information of patients, laboratory examination, echocardiography in supine and standing position, chest film in positive and lateral position, basic information of control group and echocardiography in supine and standing position were collected. The differences of clinical data between the two groups were compared and analyzed. Results: There were significant differences in left ventricular outflow tract diameter, right ventricular outflow tract diameter and right ventricular outflow tract velocity in the experimental group (their P values were 0.035, 0.011 and 0.015, respectively), but there was no significant difference in left ventricular outflow tract velocity in the standing and supine position (P=0.638). The left ventricular outflow tract diameter, the right ventricular outflow tract diameter and the right ventricular outflow tract velocity in the experimental group were significantly different (P<0.05). The internal diameters of left ventricular outflow tract in upright position, supine position, right ventricular outflow tract, supine position, right ventricular outflow tract were20.50±1.91mm, 18.75±0.96mm;10.00±6.68mm, 15.45±6.06mm;124.25±40.29cm/s and 91.00±28.93cm/s, respectively, in standing position, recumbent position, right ventricular outflow tract, right ventricular outflow tract, supine position, right ventricular outflow tract, supine position, supine position. The velocity of left ventricular outflow tract in upright position was 82.50±2.01 cm/s, and that in supine position was 83.25±2.06 cm/s. There was no significant difference in left ventricular outflow tract velocity in standing and supine position, which may be related to the compression of right ventricular outflow tract.Conclusions: In this study, we got the clinical manifestations of direct-back syndrome patients through comparison of straight back syndrome.

Sign in / Sign up

Export Citation Format

Share Document