Coronary collateral function during exercise.

Coronary collateral function during exercise.

A totally occluded coronary vessel subtending a noninfarcted, entirely collateral-dependent myocardial region (NIECDMR) provides an opportunity to assess collateral perfusion during exercise stress. Collateral function was determined by analysis of exercise thallium-201 myocardial perfusion images from 31 patients who had at least one NIECDMR (total 41 NIECDMRs) documented during catheterizatio...

Instantaneous coronary collateral function during supine bicycle exercise.

AIMS The instantaneous response of the collateral circulation to isometric physical exercise in patients with non-occlusive coronary artery disease (CAD) is not known. METHODS AND RESULTS Thirty patients (age 59 +/- 9 years) undergoing percutaneous coronary intervention because of stable CAD were included in the study. Collateral function was determined before and during the last minute of a ...

Coronary Collateral Growth Induced by Physical Exercise

Human coronary collateral recruitment is facilitated by isometric exercise during acute coronary occlusion.

OBJECTIVE To determine whether isometric exercise increases collateral flow in remote ischaemic myocardium in acute coronary occlusion models of patients with coronary artery disease. DESIGN A randomized controlled study. SUBJECTS Sixty-five patients with 1-vessel coronary artery disease. METHODS Subjects were randomly assigned to either the isometric exercise group or non-exercise group....

Regional left ventricular function during transient coronary occlusion: relation with coronary collateral flow.

OBJECTIVE To test the hypothesis that regional left ventricular (LV) function during balloon angioplasty is related to the amount of collateral flow to the ischaemic region. DESIGN Prospective study. SETTING Tertiary referral centre. METHODS In 50 patients with coronary artery disease and without myocardial infarction, regional systolic and diastolic LV function was determined using tissu...