The effect of ventricular sequential contraction on helical heart during pacing: high septal pacing versus biventricular pacing

Tomioka, Hideyuki and J. Liakopoulos, Oliver and D. Buckberg, Gerald and Hristov, Nikola and Tan, Zhongtuo and Trummer, Georg (2006) The effect of ventricular sequential contraction on helical heart during pacing: high septal pacing versus biventricular pacing. European Journal of Cardio-thoracic Surgery (295). s198-s206.

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Abstract

Objective: To investigate the effect of biventricular and high septal pacing on the normal contraction sequence of the helical ventricular
myocardial band, and its impact on left ventricular function. Methods: Ten pigs (25—68 kg) underwent analysis of percent segmental shortening
(SS%) by sonomicrometry, with crystals placed along the fiber orientation of the ascending, descending segments, and posterior LV wall within the
spatial geometry of the helical heart. Unipolar pacing electrodes stimulated the right atrium (RA) and either the right ventricular apex and left
ventricular posterior wall (atrio-biventricular), or the proximal high septum (atrio-high septal). Systemic hemodynamics, QRS-interval, cardiac
index (CI), systolic and diastolic LV functions and pressure—dimension loops (P—D) were analyzed and cardiac motion was monitored by video
analysis.

Item Type: Article
Uncontrolled Keywords: Cardiac resynchronization; Septal pacing; Helical myocardial ventricular band; Ventricular function; Helical heart
Subjects: Medical and Health Sciences > Basic medicine
Medical and Health Sciences > Clinical medicine
Divisions: Faculty of Medical Science
Depositing User: Mirjana Kocaleva
Date Deposited: 20 Mar 2013 11:13
Last Modified: 20 Mar 2013 11:13
URI: https://eprints.ugd.edu.mk/id/eprint/5920

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