| Right ventricular pacing improves haemodynamics in right ventricular failure from pressure overload: an open observational proof-of-principle study in patients with chronic thromboembolic pulmonary hypertension. | |
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MedLine Citation:
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PMID: 21784747 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Aims Right ventricular (RV) failure in patients with chronic thromboembolic pulmonary hypertension (CTEPH), and other types of pulmonary arterial hypertension is associated with right-to-left ventricle (LV) delay in peak myocardial shortening and, consequently, the onset of diastolic relaxation. We aimed to establish whether RV pacing may resynchronize the onsets of RV and LV diastolic relaxation, and improve haemodynamics. Methods and results Fourteen CTEPH patients (mean age 63.7 ± 12.0 years, 10 women) with large (≥60 ms) RV-to-LV delay in the onset of diastolic relaxation (DIVD, diastolic interventricular delay) were studied. Temporary RV pacing was performed by atrioventricular (A-V) sequential pacing with incremental shortening of A-V delay to advance RV activation. Effects were assessed using tissue Doppler echocardiography and LV pressure-conductance catheter measurements in a subset of patients. Compared with right atrial pacing, RV pacing at optimal A-V delay (average 140 ± 22 ms, range 120-180 ms) resulted in significant DIVD reduction (59 ± 19 to 3 ± 22 ms, P< 0.001), and increase in LV stroke volume as measured by LV outflow tract velocity-time integral (14.9 ± 2.8 to 16.9 ± 3.0 cm, P< 0.001), along with enhanced global RV contractility and LV diastolic filling. Conclusion Right-to-left ventricle resynchronization of the onset of diastolic relaxation results in stroke volume increase in CTEPH patients. Whether RV pacing may be a novel therapeutic target in RV failure following chronic pressure overload remains to be investigated. |
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Authors:
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Maxim Hardziyenka; Sulaiman Surie; Joris R de Groot; H A C M Rianne de Bruin-Bon; Reinoud E Knops; Maurice Remmelink; Ze-Yie Yong; Jan Baan; Berto J Bouma; Paul Bresser; Hanno L Tan |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-7-21 |
Journal Detail:
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Title: Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology Volume: - ISSN: 1532-2092 ISO Abbreviation: - Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-7-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100883649 Medline TA: Europace Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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1Heart Failure Research Center , Academic Medical Center, University of Amsterdam, The Netherlands. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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