The purpose of this paper is to study the superior relationship among the parameters of age, casual blood pressure and 24‐hour ambulatory blood pressure with left atrial and ventricular structure and left ventricular filling function in systolic hypertensives (SH).
A total of 30 male and seven female patients aged from 46‐74 (averaged at 59±7) years with stage I∼II systolic hypertension were studied. The criterion of the subjects was SBP ≥ 160 mmHg and DBP < 95 mmHg or SBP ≥ 2 × (DBP‐15 mmHg) and DBP≥95 mmHg. The parameters acted as independent variables were: age, casual systolic and diastolic blood pressure (CSBP and CDBP) and 24‐hour ambulatory systolic and diastolic blood pressure (ASBP24 and ADBP24). The parameters acted as dependent variables were ratio of the early rapid filling peak flow velocity and late atrial contractive filling peak flow velocity below the mitral valve on the pulsed‐wave spectral Doppler echocardiography (LAD/AoD). The collected data were analyzed via the superior grey relational analyses.
The results showed that the superior grey relational order in independent variables was ASBP24 > ADBP24 > CSBP > CDBP > age and the superior grey relational order in dependent variables was LAD/AoD > MVe/a > LVMI.
Among the independent variables ASBP24 is the most important factor of affecting the cardiac structure and function in SH. The first cardiac variation in SH is the left atrial structure affected by the independent variables. After that left ventricular diastolic dysfunction and the left ventricular hypertrophic changes take place in succession.
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