[Electrocardiographic monitoring of myocardial ischemia during coronary angioplasty correlated with results of the procedure].
In 24 patients 2 leads Holter monitoring was performed during percutaneous transluminal coronary angioplasty (PTCA) of left anterior descending (17 patients), right coronary artery (6 patients), left circumflex (1 patient). In 20 patients (83%) significant ST segment deviations were recorded in the lead CM2 or RV. The following characteristics of ST segment deviation were analyzed during 7 +/- 3 successive occlusions: time to onset, maximal ST shift, slope to development, time to onset and slope of ST segment normalization. In 17 patients with successful PTCA the slope of ST segment normalization increased progressively from the first to the third-fifth inflation and then was constant. The improvement in ST segment normalization velocity was correlated (p less than 0.01) with the reduction of the diameter and with improvement of sectional area of the dilated vessel. The maximal ST segment normalization slope was correlated (p less than 0.01) with the diameter and the area of the residual stenosis. Continuous electrocardiographic recording, during PTCA, for evaluation of ST segment normalization velocity is a promising approach for monitoring the immediate result of coronary angioplasty.
Variola
A
A
Istituto di Cardiologia e Chirurgia Cardiovascolare, Università degli Studi, Verona.
Salvatore
C
C
Rossi
L
L
Vassanelli
C
C
Zardini
P
P
D000328:Adult; D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D003327:Coronary Disease / Q000175:diagnosis / Q000628:therapy*; D015716:Electrocardiography, Ambulatory; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors
Evoluzione elettrocardiografica della ischemia miocardica durante angioplastica coronarica in correlazione con il risultato della procedura.