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| Clinical value of deceleration capacity and QT dispersion in predicting cardiac sudden death of patients with chronic heart failure |
| Zhang Shuo, Leng Yong-qun, Lu Jia-jia, Song Kuang-rong, Deng Yu-ying |
| (Department of Electrocardiogram Diagnosis, Wuhan No.1 Hospital, Wuhan Hubei 430022, China) |
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Abstract Objective To investigate the values of deceleration capacity(DC) and QT dispersion(QTd) in predicting cardiac sudden death(CSD) of patients with chronic heart failure(CHF). Methods One hundred CHF patients(CHF group) were randomly selected and followed up during one year. According to the existence of ventricular arrhythmia(VA), they were divided into VA group(43 cases) and non-VA group(57 cases). According to the existence of CSD, the enrolled cases were also divided into CSD group(18 cases) and survival group(82 cases). Meanwhile, another 100 healthy people examinated in our hospital were regarded as control group. In an early phase, the values of DC and QTd were measured in each group, and statistically analysed. Results Separately compared with control group, non-VA group, and survival group, differences of DC and QTd values were all statistically significant (P<0.05) in CHF group, VA group, and CSD group, respectively. The value of QTd was negative to that of DC among CHF patients. Conclusion DC and QTd values of CHF patients were associated with the severity of attacks, which can be regarded as sensitive indices to predict CSD among CHF patients.
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2015, Vol. 24 
