Transient ischemic dilatation with adenosine Tc-sestamibi stress: prognostic significance in patients with normal myocardial perfusion.

Objective: To determine the significance of transient ischemic dilatation (TID) in patients with normal perfusion on adenosine stress/rest.

Methods: We analyzed 430 consecutive patients with normal perfusion on 2-day adenosine stress/rest Tc-sestamibi. A group of 70 patients with Framingham 10-year coronary heart disease risk < 10% was used to derive abnormal TID thresholds (derivation group).