Table 2.

Correlations between cardiac time intervals and echocardiographic and anthropometric data

		QS1(ms)	QS2(ms)	S1S2(ms)	S2S1(ms)	S1S2/S2S1
Heart rate (bpm)	r	–0.198	–0.795	–0.820	–0.800	0.106
	P	0.177	<0.001	<0.001	.<001	0.499
Systolic blood pressure (mm Hg)	r	0.110	–0.243	–0.270	–0.431	0.294
	P	0.478	0.112	0.076	0.004	0.045
Diastolic blood pressure (mm Hg)	r	–0.050	–0.337	–0.344	–0.442	0.173
	P	0.748	0.025	0.022	0.003	0.262
Mean arterial pressure (mm Hg)	r	–0.028	–0.364	–0.374	–0.487	0.209
	P	0.851	0.015	0.012	0.001	0.174
Age (y)	r	–0.019	0.262	0.335	0.192	0.040
	P	0.898	0.076	0.021	0.196	0.787
Left ventricular ejection time (ms)	r	0.064	0.534	0.621	0.324	0.150
	P	0.763	0.006	0.001	0.034	0.475

QS1, electromechanical activation time; QS2, electromechanical systole; S1S2, interval between the first and second heart sounds; S2S1, interval between second and first heart sounds.