房缩间期及其对冠心病的临床意义

ATRIAL SYSTOLIC TIME INTERVAL AND ITS CLINICAL SIGNIFICANCE IN CORONARY HEART DISEASEASE

检测３２例正常人及５３例冠心病患者的心房电机械间期，心房收缩前期、心房收缩期和心房收缩前期／心房收缩期比值。发现心房电机械间期相对恒定；冠心病患者心房收缩前期缩短，心房收缩期延长，其比值缩小。上述各间期能反映心室舒张功能，可作为心舒间期的指标。

trial systolic time interval was measured in 53 patients with coronary heart disease(CHD)using electromechanio cardiogram,and compared with 32 apparently healthy subjects(N)by the following parameters :1.Atrial electromechanical interval(AEMI)was definedfrom the initiation of p wave on ECG through the termination of A wave on ACG,2.Peck ofPwave on ECG through termination of A wave on ACG (PP-A) was expected as left atrialelectromechanical interval 3.Atrial precontractive period(APCP)was defined from the ini-tiation of P wave on ECG through the onset of A wave on ACG.4.Peck of Pwave on ECGthrough onset of A wave on ACG was expected as left atrial pre-centractive period(LAPCP).5. The width of A wave was equivalent to left atrial systolic time(LAST ).6.A PCP-LAST.7.LAPCP-LAST.8.Relative height of A wave on ACG was the ratio of the magni-tude of A wave with total height of ACG(A/H%)。Patients with CHD had higher LAST and A/H% and lower A PCP,LAPCP,A PCP-LAST,LAPCP-LAST,compared with those of the controls,but the AEMI,PP-A weresimilar in bothgroups.The results suggested-that the alternation in A PCP,LAPCP,LAST,A PCP-LAST might implicate left ventrilar myocardial stiffness,These parameterswerecomplementary to the DTI.