NONINVASIVE ARRHYTHMIA RISK STRATIFICATION IN PATIENTS (PTS) WITH NONISCHAEMIC DILATED CARDIOMYOPATHY (NIDCM) AND MALIGNANT VENTRICULAR TACHYARRHYTHMIAS (MVT)
The purpose of the study was to identify the differences of ecg parameters between pts with and without MVT (ventricular tachycardia or ventricular fibrillation or sudden cardiac arrest) in population with chronic heart failure and NIDCM.
154 pts with NIDCM, sinus rhythm and ventricular premature beats were included. 112 pts had idiopathic cardiomyopathy, others had postinflammatory or toxic etiology of NIDCM. There were not pts in NYHA IV. 19 pts were in NYHA I class, 89 pts NYHA II class, 46 pts into NYHA III class. LVEF was 14-45 %. Pts were assigned to two subgroups: 41 pts with episodes of MVT and 113 pts without MVT. Results are presented in table below.
TO-turbulence onset, TS-turbulence slope, HRT0= TO 2,5ms/RR, HRT1=TOpatol or TSpatol, HRT2= TOpatol+ TSpatol, SDNN-standard deviation of normal intervals, QTcmean– meanQT corrected interval, HRd=difference between maximum and minimum sinus rhythm, nsVT–nonsustained ventricular tachycardia, LVEF–left ventricular ejection fraction, NYHA–New York Heart Association Heart Failure Classification, QRS– duration of QRS complex
Conclusions: Pts with MVT were older (p=0.003), had more frequently syncope and longer meanQTc (p=0.012). Subgroups didn’t differ in duration of QRS complex, SDNN, nsVT, HRd and HRT, NYHA class and LVEF.