Strain measurements during adenosine triphosphate infusion before and after percutaneous coronary intervention.

Background: In regional myocardial ischemia, contractile delay develops, which can be assessed by measuring time to peak strain (TPS) on tissue Doppler imaging. The aims of the present study were to clarify the usefulness of TPS measurements during adenosine triphosphate (ATP) stress in assessing myocardial ischemia and to evaluate whether prolongation of TPS disappears immediately after percutaneous coronary intervention (PCI) or not.

Methods And Results: A total of 26 patients underwent strain measurements before and after PCI.

Noninvasive prediction of angiographic spasm provocation using trans-thoracic Doppler echocardiography in patients with coronary spastic angina.

Background: In the present study it was examined whether transthoracic Doppler echocardiography (TTDE) would be useful for noninvasive diagnosis of coronary spastic angina (CSA) by assessing coronary arterial tone in the morning.

Methods And Results: The study population comprised 21 CSA patients and 27 control subjects. All diagnoses were angiographically confirmed by provocation test using acetylcholine.