1. Coronary collateral vessels in patients with previous myocardial infarction
- Author
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Hiroshi Ogawa, Toshiro Miura, Yasuo Matsuda, M. Khono, Reizo Kusukawa, Masaharu Ozaki, K Moritani, Nakatsuka M, Yuhji Furutani, and Shimizu T
- Subjects
Male ,Cardiac Catheterization ,medicine.medical_specialty ,Heart Ventricles ,medicine.medical_treatment ,Physical Exertion ,Myocardial Infarction ,Collateral Circulation ,Blood Pressure ,Coronary Disease ,Scintigraphy ,Internal medicine ,medicine ,Humans ,cardiovascular diseases ,Myocardial infarction ,Radionuclide Imaging ,Aged ,Retrospective Studies ,Cardiac catheterization ,medicine.diagnostic_test ,business.industry ,Heart ,General Medicine ,Middle Aged ,medicine.disease ,Collateral circulation ,Coronary Vessels ,Myocardial Contraction ,Coronary arteries ,Thallium Radioisotopes ,Stenosis ,Blood pressure ,medicine.anatomical_structure ,cardiovascular system ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business ,Artery - Abstract
To assess the degree of collateral vessels after myocardial infarction, coronary angiograms, left ventriculograms, and exercise thallium-201 myocardial scintigrams of 36 patients with previous myocardial infarction were reviewed. All 36 patients had total occlusion of infarct-related coronary artery and no more than 70% stenosis in other coronary arteries. In 19 of 36 patients with transient reduction of thallium-201 uptake in the infarcted area during exercise (Group A), good collaterals were observed in 10 patients, intermediate collaterals in 7 patients, and poor collaterals in 2 patients. In 17 of 36 patients without transient reduction of thallium-201 uptake in the infarcted area during exercise (Group B), good collaterals were seen in 2 patients, intermediate collaterals in 7 patients, and poor collaterals in 8 patients (p less than 0.025). Left ventricular contractions in the infarcted area were normal or hypokinetic in 10 patients and akinetic or dyskinetic in 9 patients in Group A. In Group B, 1 patient had hypokinetic contraction and 16 patients had akinetic or dyskinetic contraction (p less than 0.005). Thus, patients with transient reduction of thallium-201 uptake in the infarcted area during exercise had well developed collaterals and preserved left ventricular contraction, compared to those in patients without transient reduction of thallium-201 uptake in the infarcted area during exercise. These results suggest that the presence of viable myocardium in the infarcted area might be related to the degree of collateral vessels.
- Published
- 1987