QRS WAVES OF THE SPATIAL VELOCITY ELECTROCARDIOGRAM IN PATIENTS WITH DILATED CARDIOMYOPATHY - ITS DIAGNOSTIC CONTRIBUTIONS AND RELATION TO VENTRICULAR-TACHYCARDIA

Citation
A. Takimiya et al., QRS WAVES OF THE SPATIAL VELOCITY ELECTROCARDIOGRAM IN PATIENTS WITH DILATED CARDIOMYOPATHY - ITS DIAGNOSTIC CONTRIBUTIONS AND RELATION TO VENTRICULAR-TACHYCARDIA, American journal of noninvasive cardiology, 7(3), 1993, pp. 145-151
Citations number
NO
Categorie Soggetti
Cardiac & Cardiovascular System
ISSN journal
02584425
Volume
7
Issue
3
Year of publication
1993
Pages
145 - 151
Database
ISI
SICI code
0258-4425(1993)7:3<145:QWOTSV>2.0.ZU;2-T
Abstract
To evaluate the clinical utility of the spatial velocity electrocardio graphy (SVECG)-QRS complex in the diagnosis of dilated cardiomyopathy (DCM), studies were carried out on a series of 120 subjects divided in to 5 groups. The two peaks of the SVECG-QRS complex rho1-Mag and rho2- Mag) were significantly depressed in the DCM group, compared to all ot her groups, that is, 30 normal subjects (p < 0.05, p < 0.01), 26 patie nts with aortic regurgitation and mitral regurgitation (p < 0.01, p < 0.01), 18 patients with diffuse hypertrophy (p < 0.01, p < 0.01), and 19 patients with cardiac dysfunction and ischemic heart disease with v entricular dilatation (p < 0.01, p < 0.05). Decrease in SVECG-QRS wave height in DCM patients is considered specific for DCM. When 26 DCM pa tients were divided into a subgroup ventricular tachycardia, VT(+)! o f 11 patients with a history of monomorphic VT (greater-than-or-equal- to 6 consecutive ventricular complexes occurring at a rate of 100 beat s/min) and a subgroup VT(-)! of 15 other DCM patients, rho1-Mag was s ignificantly depressed in the VT(+) subgroup compared to the VT(-) sub group (71.5 +/- 27.0 versus 97.2 +/- 31.2 mV/s, p < 0.05), and rho2-Ma g tended to be lower in the VT(+) subgroup (93.3 +/- 39.9 versus 100.3 +/- 34.0 mV/s). Both rho1-Mag and rho2-Mag were markedly depressed in the DCM patients who were claimed by VT. These data suggest that: (1) decrease in SVECG-QRS wave height is a new ECG sign of DCM; (2) marke d depression in SVECG-QRS wave may be an important sign in predicting progress in DCM.