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Objective To investigate the correlation between ventricular premature complexes(PVC) and mean heart rate, as well as the frequency domain characteristics of Holter monitor in non-elderly population of different genders. Methods One hundred and ten cases of non-elderly outpatient patients with PVC load of >1% were enrolled and divided into male group and female group. After the Holter examination, the average heart rate per hour of each sample and the correlation analysis of PVC were divided into fast-heart rate correlated PVC (F-HR-PVC), slow heart rate correlated PVC (S-HR-PVC) and independent heart rate correlated PVC (I-HR-PVC), so as to analyze the proportion of PVC types and time domain indexes of heart rate variability(HRV) between the two groups ResultsIn the male group, the proportion of F-HR-PVC was significantly higher than that of the female group (60.0% vs.33.3%), while the proportion of I-HR-PVC and S-HR-PVC was lower than that of the female group respectively(24.0% vs.36.7%, 16.0% vs.30.0%) HRV analysis of the patients in the two groups showed that rMSSD (40.64±27.40 vs.27.83±9.31,P=0.020) and pNN50 (11.60±9.31 vs. 7.17±5.92, P=0037) in the male group were higher than that of the female group. The SDNN and SDANN showed no statistical difference between the two groups.ConclusionIn the non-elderly population without definite heart disease, the proportion of F-HR-PVC in the male group was higher than that in the female group, and the proportion of S-HR-PVC and I-HR-PVC was lower than that in the female group, suggesting that the clinical incidence of PVC in the male group may be related to the increase of sympathetic nervous tone, and the female group may be related to the sympathetic parasympathetic nervous system and estrogen. [ABSTRACT FROM AUTHOR]

Ambulatory ECG (AECG) is not only widely used to detect arrhythmias in clinic, but also to satisfy the variety of clinical needs, which involves different clinical personnel. As a result, it's necessary to understand the advantages and limitations of the AECG. In this paper, the specifically implemented technique of cardiac monitoring technology, ECG data management and emerging technologies are introduced in detail. In addition, the consensus of the committee on the indication and classification of AECG is summarized. [ABSTRACT FROM AUTHOR]

Early repolarization (ER) shows obvious J wave and ST segment downward elevation. Since its electrocardiographic features are similar to variant angina, acute pericarditis and Brugada syndrome, it is easy to be misdiagnosed and mistreated clinically. Therefore, it is very important to make correct diagnosis and differential diagnosis in time. The purpose of this paper is to discuss the diagnostic value of ambulatory ECG and treadmill exercise test for ER syndrome, and to review its definition, classification, diagnostic value, ECG characteristics, mechanism, advantages and disadvantages of examination. [ABSTRACT FROM AUTHOR]