The third heart sound after exercise in athletes: an exploratory study.

The purpose of our study was to investigate the frequency of the third heart sound (S3) of athletes after exercise, and to determine whether the frequency and amplitude of S3 were related to cardiac function. The phonocardiogram exercise test (PCGET) was used in this study, and healthy volunteers consisting of 84 athletes (age 21.0±1.

Change of cardiac reserve during abnormal pregnancy and its evaluation.

Objective: To investigate the change of cardiac reserve during abnormal pregnancy and explore its evaluation methods.

Methods: Totally 96 women with abnormal pregnancies (AP group), 356 women with normal pregnancies (NP group), and 100 women of childbearing age (CBA group) were monitored by the exercise cardiac contractility monitor (ECCM). Phonocardiogram of participants at resting status was recorded by ECCM.

[Research on a new method and index for evaluating cardiac function of the athletes].

Objective: To explore the new indexes and new methods for the noninvasive measuring and evaluating cardiac function detection of the athletes.

Methods: Heart sound signals were sampled randomly from 81 students in physical education department (experiment group) and 41 students in general departments (control group) after completing designed workload during step-climbing exercise, the contrast study on heart rate, D/S ratio as well as the S1/S2 ratio of students from physical education and general department has been conducted.

Results: In the resting state, the physical education department students' heart rate and D/S ratio was 66 +/- 8.

[Clinical analysis of cardiac reserve function and outcome of preeclampsia.].

Objective: To investigate cardiac reserve function and pregnant results of preeclampsia.

Methods: Pregnant women chosen by randomized table and hospitalized in the department of obstetrics of the first affiliated hospital of Chongqing Medical University were involved in this study from January to December, 2008. Sixty-nine cases of normal pregnant women were divided into 3 groups: normal group 1 (20 cases), normal group 2 (26 cases) and normal group 3 (23 cases).