Do overlapping vessels protect against @entity235 right ventricular infarction after XXXX ?

@entity308 @entity39 @entity235 @entity1563 @entity16 @entity910 @entity2845 @entity655
The severity of ischaemia in the left ventricle from total @entity1563 is modified by retrograde blood flow through collateral or overlapping vessels, but whether that is true for the right ventricle is not known. The consequences and extent of @entity16 from occlusion of the right coronary artery were studied in anaesthetised @entity235 . In group 1 (n = 9), the right coronary artery alone was occluded; in group 2 (n = 8), the right coronary artery and overlapping vessels from the left anterior descending and circumflex coronary arteries were occluded. Occlusion for 2 h caused right ventricular end diastolic pressure to increase by 2.8(SEM 0.4) mm Hg in group 1 (p less than 0.05) and by 1.9(0.5) mm Hg in group 2 (p less than 0.05). Fractional shortening in the ischaemic zone became @entity2845 in group 1: 12.0(1.4)% v 0.1(1.6)%; p less than 0.05; and @entity910 in group 2: 12.1(2.1)% v -1.2(0.9)%; p less than 0.05. In both groups, fractional shortening remained @entity308 during the ensuing 2 h of reperfusion. The incidence of right ventricular free wall @entity39 was 56% in group 1 but 100% in group 2 (p = 0.082). The area of @entity39 , expressed as a percentage of the area at risk, was 13.9(6.6)% in group 1 in contrast to 66.9(4.5)% in group 2 (p less than 0.05). Both groups had equal involvement of the @entity655 . We conclude that ligating epicardial overlapping vessels in addition to the right coronary artery produces a larger area of right ventricular free wall @entity39 .
