Hyperventilation and ergonovine tests in prinzmetal's variant angina pectoris in men

2011 ACCF/AHA Focused Update Incorporated Into the ACC/AHA 2007 Guidelines for the Management of Patients With Unstable Angina/Non–ST-Elevation Myocardial Infarction

“…Episodes of Prinzmetals angina often occur in clusters, with prolonged asymptomatic periods of weeks to months. Attacks can be precipitated by an emotional stress, hyperventilation, 895 exercise, 896 or exposure to cold. 897 A circadian variation in the episodes of angina is most often present, with most attacks occurring in the early morning.…”

2012 ACCF/AHA Focused Update Incorporated Into the ACCF/AHA 2007 Guidelines for the Management of Patients With Unstable Angina/Non–ST-Elevation Myocardial Infarction

“…Episodes of Prinzmetal's angina often occur in clusters, with prolonged asymptomatic periods of weeks to months. Attacks can be precipitated by an emotional stress, hyperventilation, 1039 exercise, 1040 or exposure to cold. 1041 A circadian variation in the episodes of angina is most often present, with most attacks occurring in the early morning.…”

Incidence, Pathophysiology, and Treatment of Complications During Dobutamine-Atropine Stress Echocardiography

“…Alternatively, coronary spasm may be caused by hyperventilation in an anxious patient. 91 Coronary spasm should be suspected in patients with dobutamine stress-induced ST-segment elevation in noninfarct leads and severe new wall motion abnormalities, although these may be absent in distal spasm, 85 in combination with nonsignificant lesions on coronary angiography. ST-segment elevation in noninfarct leads has also been linked to transmural myocardial ischemia due to severe CAD.…”

“…La survenue d'un spasme coronaire peut également être causée par l'hyperventilation chez un patient anxieux. 91 Il y a lieu de suspecter un spasme coronaire lorsque, chez un patient, l'épreuve de stress sous dobutamine induit un sus-décalage du segment ST dans les dérivations n'explorant pas une zone infarcie ainsi que l'apparition d'un trouble sévère de la cinétique pariétale (bien que celui-ci puisse faire défaut en cas de spasme distal 85 ), cela allant de pair avec la mise en évidence de lésions non significatives par la coronarographie. Le sus-décalage du segment ST dans les…”