Beneficial effects of atrioventricular synchrony in dogs with right coronary artery embolization, and complete heart block.

Beneficial effects of atrioventricular synchrony in dogs with right coronary artery embolization, and complete heart block. Research Abstract Details 

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Beneficial effects of atrioventricular synchrony in dogs with right coronary artery embolization, and complete heart block. Abstract Text:

M F Matangi,J N Cohn,

Complete heart block complicating right ventricular infarction frequently is accompanied by shock. Hemodynamic responses to different pacing modes were studied in six anesthetized, closed chest dogs following right coronary artery embolization with mercury and heart block induced by repetitive trans-septal DC shock. Hemodynamics were recorded at control, following right coronary artery embolization, during atrioventricular sequential pacing (DVI) and ventricular pacing (VVI). With respect to the hemodynamics recorded during VVI and DVI pacing; (1) The mean arterial pressure increased by 29.4% during DVI pacing (92.1 +/- 31.3 mm Hg vs 73.4 +/- 28.9 mm Hg p less than 0.005). This increase was primarily due to an augmentation in systolic arterial pressure. (2) The left ventricular end diastolic pressure increased by 35.8% during DVI pacing (16.3 +/- 5.3 mm Hg vs 12.0 +/- 4.3 mm Hg p less than 0.01). (3) Cardiac output improved by 33.8% during DVI pacing (2.34 +/- 0.75 L/min vs 1.76 +/- 0.59 L/min, p less than 0.0005). This was a consistent improvement in cardiac output with a narrow range of 27.1% to 39.0%. (4) There were no significant changes in right atrial, pulmonary, pulmonary capillary wedge pressures or in systemic vascular resistance. In dogs with right coronary artery occlusion and complete heart block DVI pacing is clearly superior to VVI pacing. This is probably because the atrial contribution to ventricular filling, in this model, is critically important to maintain an adequate cardiac output.

Beneficial effects of atrioventricular synchrony in dogs with right coronary artery embolization, and complete heart block. Publishing Authors By Initials

MF Matangi,JN Cohn,

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Beneficial effects of atrioventricular synchrony in dogs with right coronary artery embolization, and complete heart block. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Canadian journal of cardiology

VOLUME: 3

Page Numbers: 144-7

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ISSN: 1916-7075

DAY: 3

MONTH: Apr

YEAR: 1987

Beneficial effects of atrioventricular synchrony in dogs with right coronary artery embolization, and complete heart block. Information

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LANGUAGE: eng

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Beneficial effects of atrioventricular synchrony in dogs with right coronary artery embolization, and complete heart block. Keywords Mesh Terms:

KEYWORDS: Male

MESH TERMS: therapy

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Country: CANADA

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MEDLINETA: Can J Cardiol

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