Low voltage of electrocardiogram in patients with chronic heart failure
LI Xiao-hui
YUAN Hua-bin
QI Jian-wei
YAN Wen-jie
LI Cheng-fang
Abstract：Objective To analyze the low voltage of electrocardiogram (ECG) in patients with chronic heart failure (CHF). Methods CHF patients (n=200, patient group) were chosen and other healthy controls (n=200, control group) were chosen from Feb. 2012 to July 2014. All patients were given routine cardiac echocardiography examinations for detecting left ventricular end-systolic diameter (LVESd), left ventricular end-diastolic inner diameter (LVEDd) and cardio-thoracic proportion, and observing the occurrence of QRS low voltage in different leads. Results LVESd [(60.49±5.39) mm vs. (29.80±3.36) mm], LVEDd [(72.77±6.11) mm vs. (47.38±3.60) mm] and cardio-thoracic proportion [(0.58±0.09) vs. (0.42±0.04)] increased in patient group compared with control group (P<0.05). Compared with control group, voltage amplitude of limb lead decreased, QRS duration increased significantly and QTc duration was significantly prolonged [(8.82±2.14) mV vs. (4.33±2.13) mV, (76.39±17.33) ms vs. (109.38±18.33) ms, (219.37±45.39) mV vs. (444.98±34.29) mV, all P<0.05]. More QRS low voltage in III lead was observed in patients with LAD lesion, and QRS low voltage in II lead and III lead was observed in patients with LCX lesion. Conclusion CHF is commonly accompanied by abnormal ultrasound and ECG indexes and QRS low voltage.
Keywords：Chronic heart failureElectrocardiogramLow voltageQRS duration
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 304-306 )