Effect of percutaneous transluminal coronary angioplasty on coronary reserve

Conference · Sat Dec 31 23:00:00 EST 1983 · J. Nucl. Med.; (United States)

OSTI ID:6476329

Lassar, T; Hendrix, L; Ray, G; Schmidt, D

This study was done to assess the effect of percutaneous transluminal coronary angioplasty (PTCA) on regional myocardial perfusion (RMP) in the region distal to a stenosis in 48 patients. Quantitative RMP in ml/100g/min was measured from the washout of Xe-133 following selective injection into the involved coronary artery. After successful dilation, determined by a reduction in %stenosis to a less than or equal to 50% lesion and in pressure gradient across the lesion, the RMP measurement was repeated. In these patients, means %stenosis was 85% pre PTCA and 29% post PTCA with mean pressure gradient of 60 Hg pre PTCA and 21 mm Hg post PTCA. 21 of these 48 patients also had RMP measured after isoproterenol (ISO) both pre and post PTCA to increase myocardial oxygen demand to assess coronary reserve. Heart rate (HR) and systolic blood pressure (SBP) were constant pre and post PTCA which allowed a valid comparison. The results are presented. A group of 13 patients with normal coronary arteries and ventricular function showed a mean control RMP of 78 +- 15 and a mean ISO RMP of 140 +- 26. The data demonstrate that following successful PTCA quantitative RMP improves both at rest and with an ISO challenge and is similar to RMP in normal coronary arteries.

• Research Organization: Univ. of Wisconsin Medical School, Mount Sinai Medical Center, Milwaukee, WI
• OSTI ID: 6476329
• Report Number(s): CONF-840619-
• Journal Information: J. Nucl. Med.; (United States), Journal Name: J. Nucl. Med.; (United States) Vol. 25:5; ISSN JNMEA
• Country of Publication: United States
• Language: English

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