Changes in absolute coronary flow and microvascular resistance during exercise in patients with ANOCA.

ABSTRACT:

Background

Whether saline-induced hyperaemia captures exercise-induced coronary flow regulation remains unknown.

Aims

Through this study, we aimed to describe absolute coronary flow (Q) and microvascular resistance (Rμ) adaptation during exercise in participants with angina with non-obstructive coronary artery disease (ANOCA) and to explore the correlations between saline- and exercise-derived coronary flow reserve (CFR) and microvascular resistance reserve (MRR).

Methods

Rμ, Q, CFR and MRR were assessed in the left anterior descending artery using continuous thermodilution with saline infusion at 10 mL/min (rest), 20 mL/min (hyperaemia) and finally at a 10 mL/min infusion rate during stress testing with a dedicated supine cycling ergometer. An incremental workload of

SUBMITTER: Zeitouni M 

PROVIDER: S-EPMC11317832 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature