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Biomedical subjects

A Medici

Publications and source records attributed to A Medici.

At least 37 records · Page 2Linked to original sources
PubMed1981

Treatment of vasospastic angina pectoris at rest with nitroglycerin ointment: a short-term controlled study in the coronary care unit.

The effectiveness of nitroglycerin ointment in vasospastic angina pectoris at rest was evaluated in 10 patients selected for study. The study was performed after a 24 hour control period, and a randomized single-blind crossover experimental design was followed. Two percent nitroglycerin ointment (15 mg) or placebo ointment was administered every 6 hours for a period of 48 hours each; the first treatment period was followed by a second in which each preparation was used for a 24 hour period. All patients were hospitalized in the coronary care unit; an objective evaluation was carried out using a multichannel electrocardiographic recording to assure recognition of the painless ischemic episodes. Coronary angiography showed critical stenosis of one or two vessels in 9 of the 10 patients; spasm was demonstrated in 3. Results of the ergonovine test were positive in nine of nine patients. Nitroglycerin ointment produced a significant reduction in the mean daily number of episodes during the first (12.5 +/- 3.9 versus 0.5 +/- 0.4, p less than 0.02) as well as the second treatment period (10.6 +/- 3.8 versus 0.6 +/- 0.4, p less than 0.02). These results demonstrate that nitroglycerin ointment provides effective, long-lasting protection against angina due to coronary spasm.

Adult↗
PubMed1980

Treatment of angina at rest with nifedipine: a short-term controlled study.

The effectiveness of nifedipine in treating angina pectoris at rest was evaluated in 14 patients with frequent ischemic episodes associated with S-T segment elevation or depression. The trial consisted of (1) a 48 hour control period; (2) a placebo period and a period of treatment with nifedipine of 48 hours each; and (3) a second placebo period and a second period of treatment with nifedipine of 24 hours each. The efficacy of treatment was evaluated by continuous electrocardiographic recording to detect painless ischemic episodes. During coronary angiography coronary spasm was demonstrated in five patients. The ergonovine maleate test was positive in seven of eight patients. No statistically significant difference was found in the mean daily number of ischemic episodes between the control period and the first placebo period, or between the control and the second placebo periods. Nifedipine produced a highly significant reduction in the mean daily number of episodes compared with the response to placebo during the first as well as the second period. Nifedipine is effective in angina at rest caused by coronary arterial spasm. The prevention of ischemia may be related to the ability of nifedipine to decrease calcium-dependent coronary muscle tone and to prevent coronary spasm.

Adult↗
PubMed1980

[Sustained effect of nitroglycerin ointment on exercise tolerance in patients with effort angina (author's transl)].

The effect on exercise tolerance of nitroglycerin (NTG) ointment was studied by exercise test on bicycle ergometer in a selected group of patients with effort angina and angiographically proven critical coronary lesions. NTG ointment (15 mg) and placebo were administered in a double-blind cross-over randomized trial on two consecutive days; exercise test was carried out before the administration of NTG ointment and placebo, and repeated after one hour, 2 and 1/2 hours and 4 hours. Compared to control and placebo tests, NTG ointment produced a highly significant increase of duration of exercise and of total work load in all tests, as well as a significant decrease of maximal ST segment depression. After NTG ointment administration resting systolic blood pressure showed a significant decrease after one hour, 2 and 1/2 hours and 4 hours, resting heart rate a significant increase after 2 and 1/2 and 4 hours, and peak exercise heart rate a significant increase after 4 hours. Double product at rest was unaffected by NTG ointment, while at peak exercise it showed a significant increase only after 4 hours. Our data show that in patients with effort angina NTG ointment produces an important increase of exercise capacity which persists at least for 4 hours after the administration. Therefore NTG ointment seems to be of high value in the treatment of effort angina.

Adult↗