[Bicycle exercise test, Holter ECG monitoring and hyperventilation test in diagnosis coronary arteries stenosis in postmyocardial infarction patients].
To assess contribution of dynamic (vasospastic) stenosis to pathogenesis of anginal attacks in postmyocardial patients, 148 patients 15-4 months after the infarction were examined using bicycle exercise, Holter ECG monitoring and hyperventilation test (HVT). The relations between painless myocardial ischemia and vasospastic reactions in the course of hyperventilation were also studied. The ECG segment ST responded similarly in 97% of the patients. In positive HVT there was a slight rise in the heart rate and double product. Vasospastic reactions prevailed in the disease aggravation. Dynamic stenosis in postmyocardial patients is characterized by significant variability of ischemia threshold and total duration of ischemic episodes more than 30 minutes for 24 hours.
A P
AP
Ivanov
I A
IA
El'gardt
N S
NS
Sdobniakova
D000328:Adult; D000787:Angina Pectoris / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D015716:Electrocardiography, Ambulatory; D005080:Exercise Test / Q000379:methods; D005260:Female; D006801:Humans; D006985:Hyperventilation; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications* / Q000503:physiopathology; D011379:Prognosis; D012129:Respiratory Function Tests / Q000379:methods*; D012720:Severity of Illness Index