Cardiovascular magnetic resonance measurement of coronary arterial blood flow at rest and after submaximal exercise.

Objective: Because most daily activities are conducted at submaximal exercise level, treatments are implemented to improve submaximal coronary artery blood flow (CABF). We sought to validate the reproducibility of cardiovascular magnetic resonance imaging measurements of submaximal CABF.

Methods: We measured CABF in the left anterior descending artery in 11 healthy postmenopausal women at rest and after submaximal bike exercise on 2 occasions 8 to 16 weeks apart.