Sequential deformation and physiological considerations in unipolar right or left ventricular pacing

J. Liakopoulos, Oliver and Tomioka, Hideyuki and D. Buckberg, Gerald and Tan, Zhongtuo and Hristov, Nikola and Trummer, Georg (2006) Sequential deformation and physiological considerations in unipolar right or left ventricular pacing. European Journal of Cardio-thoracic Surgery (295). s188-s197.

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Abstract

Objective: To determine the effects of ventricular 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 and descending segments, and posterior LV wall of the
geometry of the helical heart. Unipolar pacing electrodes stimulated either the right atrium (RA), right ventricular apex (RVA) and outflow tract
(RVOT), or posterior LV wall. Systemic hemodynamics, QRS-interval, cardiac index (CI), systolic and diastolic LV function and pressure—dimension
(P—D) loops were analyzed and cardiac motion was monitored by video analysis.

Item Type: Article
Uncontrolled Keywords: Ventricular pacing; Helical myocardial ventricular band; Ventricular function; Helical heart; Sonomicrometry
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 11:12
Last Modified: 04 Nov 2013 13:28
URI: https://eprints.ugd.edu.mk/id/eprint/5919

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