title: [Two cases of acute coronary occlusion after successful coronary angioplasty associated with a treadmill stress testing].
abstract: We presented two cases of acute coronary occlusion after successful percutaneous transluminal coronary angioplasty (PTCA) associated with a treadmill stress testing. Case 1: A 54-year-old man with effort angina was referred to our hospital for cardiac catheterization. At the time of cardiac catheterization, the proximal RCA had a 99% diameter narrowing, and the proximal LCX had a 90% diameter narrowing. PTCA was performed and both lesions were successfully dilated. Eight days after PTCA, he had a symptom-limited treadmill stress testing, using the Bruce protocol. The exercise was terminated at a peak heart rate of 173/min (103% of aged-predicted maximal heart rate), and at a maximal systolic blood pressure of 140 mmHg. A few minutes after the end of exercise, he developed a severe chest pain and ECG changes, which showed ST elevation in leads II, III, aVF and ST depression in leads V4-V6. Emergency coronary angiography disclosed an acute coronary occlusion of RCA at the site of PTCA. Emergency PTCA was performed and the lesion was successfully re-dilated. Case 2: A 68-year-old man was referred to our hospital for cardiac catheterization a month after subendocardial anterior myocardial infarction. At the time of cardiac catheterization, the proximal LAD have a 99% diameter narrowing. PTCA was performed and the lesion was successfully dilated. 18 days after PTCA, he had a symptom-limited treadmill stress testing, using the Bruce protocol. The exercise was terminated at a peak heart rate of 158/min (102% of aged-predicted maximal heart rate), and at a maximal systolic blood pressure of 218 mmHg. Ten minutes after the one of 218 mmHg.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Third Department of Internal Medicine, Toho University, School of Medicine.
authors.forename: K
authors.initials: K
authors.lastname: Mitsuo
authors.forename: T
authors.initials: T
authors.lastname: Degawa
authors.forename: M
authors.initials: M
authors.lastname: Tohma
authors.forename: S
authors.initials: S
authors.lastname: Nakamura
authors.forename: K
authors.initials: K
authors.lastname: Ui
authors.forename: M
authors.initials: M
authors.lastname: Nakamura
authors.forename: H
authors.initials: H
authors.lastname: Yoshimura
authors.forename: S
authors.initials: S
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Hase
authors.forename: K
authors.initials: K
authors.lastname: Ninomiya
mesh_terms: D000208:Acute Disease; D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D003327:Coronary Disease / Q000209:etiology* / Q000628:therapy; D005080:Exercise Test / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged