Abstract
We evaluated the effect of three different anti-ischemic therapeutic regimens on ventricular arrhythmias in 25 patients hospitalized for unstable angina. All patients were randomized to receive (in addition to infusion of heparin, diltiazem, and nitrates), either placebo, or streptokinase (SK) 1,500,000 U in 1 h, or SK 250,000 U in 30 min followed by 100,000 U/h for 48 h. Patients underwent ECG monitoring during the first 72 h after admission and for 24 h after 15 days of oral therapy with diltiazem, aspirin, and transdermal nitrates. Premature ventricular complexes (PVC) and ventricular tachycardia episodes (VT) were significantly reduced during the early phase of hospitalization and after 15 days, in patients treated with prolonged SK infusion. Ventricular arrhythmias are a frequent finding in unstable angina: they are correlated neither to the severity of coronary disease nor to ventricular function; prolonged infusion of SK added to heparin, diltiazem, and nitrates seems to reduce the number and severity of ventricular arrhythmias.
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