Aortic pulse pressure and atherosclerotic structural alterations of coronary arteries

Area of Science:

• Cardiology
• Vascular Medicine
• Diagnostic Imaging

Background:

• Pulse pressure (PP) is an established predictor of myocardial infarction, particularly in individuals over 50.
• In patients with preserved ejection fraction (EF), aortic PP correlates with coronary atherosclerosis severity.
• The predictive value of PP in patients with reduced EF remains underexplored.

Purpose of the Study:

• To investigate the association between intra-aortic pulse pressure (PP) and coronary atherosclerosis in patients with severe coronary ischemic disease and reduced EF.
• To determine if intra-aortic PP predicts coronary calcification, occlusion, or stenosis severity.

Main Methods:

• Analysis of 1337 patients with severe coronary ischemic disease.
• Measurement of intra-aortic and brachial blood pressures, ejection fraction (EF), and coronary angiography.
• Statistical adjustment for EF and heart rate.

Main Results:

• Decreased intra-aortic PP significantly predicted coronary occlusion (P<0.01).
• Increased intra-aortic PP showed a marginal, non-significant association with coronary calcification (P=0.06).
• Intra-aortic PP did not correlate with stenosis number; brachial SBP/DBP showed no predictive value.

Conclusions:

• Intra-aortic PP is a significant predictor of coronary occlusions and potentially calcifications in high-risk populations, irrespective of reduced EF or high heart rate.
• Unlike SBP and DBP, intra-aortic PP offers unique predictive insights into coronary artery disease severity.
• Further research may elucidate the role of PP in predicting specific coronary lesion types.