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• W2110196165 abstract "To assess the clinical, coronary arteriographic, and hemodynamic differences between the unstable angina patients manifesting ST segment depression and those showing ST segment elevation as well as those demonstrating chest pain only without ST segment deviation during pacing, low-dose digital subtraction ventriculography was performed in 33 patients before and after abrupt cessation of atrial pacing during selective coronary arteriography. Transient ST segment depression during pacing was observed in 17 patients (52%), whereas 6 patients (18%) showed ST segment elevation; however, 10 patients (30%) did not manifest any ST segment deviation in spite of typical chest pain. Hypertension and a history of myocardial infarction were observed in a significantly higher (P < 0.05) proportion of patients with ST segment depression than in those with ST elevation. Patients who manifested ST segment depression during pacing had a higher incidence of triple-vessel disease (65 vs 17%; P < 0.05) as compared with the patients with ST segment elevation. Indirect evidence of intracoronary thrombi (complicated lesion, abrupt occlusion, and intraluminal filling defect) was noticed in a higher frequency (P < 0.05) in the group of patients with ST elevation during pacing. In patients with ST segment depression, no significant changes of global left ventricular (LV) func tional parameters were observed. However, the length of the LV severe hypokinetic region was increased significantly (6.2 ±3.1 vs 23.5 ±6.2%; P < 0.05) during pacing in this group of patients. The shortening of the affected segments of the left ventricle was decreased significantly (52.3 ±3.6 vs 38.3 ±4.9%; P < 0.05) in these patients during pacing. In the group of patients with ST segment elevation during pacing, decrease in ejection fraction was associated with significant (P < 0.01) increase in midwall equato rial diastolic stress as compared with the patients with pacing-induced ST segment depression as well as patients without ST segment deviation. In the group of patients without ST segment deviation during pacing there was no considerable aggravation of LV global or regional function. This distinction should be taken into consideration in evalu ating patients with unstable angina for diagnostic and therapeutic intervention." @default.
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• W2110196165 date "1995-07-01" @default.
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• W2110196165 title "Pacing-Induced ST Segment Deviation in Patients with Unstable Angina: Clinical, Angiographic, and Hemodynamic Correlation" @default.
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• W2110196165 doi "https://doi.org/10.1177/000331979504600703" @default.
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