Objectives To determine the prevalence of physiological valvular regurgitation in Chinese and analyse the distribution characteristics of physiological pulmonary regurgitation (PR) in the crowd.
Methods 1750 subjects without cardiac diseases from Qilu Hospital of Shandong University were chosen to be examined by echocardiography. All physiological valvular regurgitation was recorded. The characteristics of physiological PR observed from colour-Doppler echocardiography were recorded. The maximum regurgitation pressure of physiological PR was measured by continuous-wave Doppler.
Results The prevalence of physiological PR was 30.86%, which was the highest in the crowd and followed by tricuspid regurgitation 14.63%, mitral regurgitation 7.37% and aortic regurgitation 2.06%. The distribution of physiological PR in the crowd was as follows. It was much higher in young subjects less than 20 years old and elders more than 60 years old (P < 0.05) and there was no difference in men and women (P > 0.05). Meanwhile, the prevalence of physiological PR in subjects with tricuspid regurgitation (TR) was 39.06%, which was higher than the overall prevalence (P < 0.05). The maximum regurgitation pressure of physiological PR measured by continuous-wave Doppler was 7.6 ± 3.9 mmHg.
Conclusions Of all physiological valvular regurgitation physiological PR was most commonly seen. It had its own characteristics observed from Doppler echocardiography and its distribution in the crowd was special. The maximum regurgitation pressure may be used as a reference for the diagnosis of physiological PR.