Interaction between the left ventricular ejection fraction and left ventricular strain and its relationship with coronary stenosis

Table 1 Magnetic resonance imaging results of the left ventricular function

Group	Participants	LVEF, %	LVESV, mL	LVEDV, mL
Observation	97	44.19 ± 9.71	88.51 ± 17.52	147.32 ± 18.32
Control	93	66.92 ± 10.23	33.64 ± 10.23	100.03 ± 23.19
t value		15.713	26.215	15.613
P value		0.000	0.000	0.000

LVEDV: Left ventricular end-diastolic volume; LVEF: Left ventricular ejection fraction; LVESV: Left ventricular end-systolic volume.

Table 2 Left ventricular stress test results

Groups	Participants	LS, %	CS, %	RS, %
Observation	97	-11.21 ± 3.87	-14.85 ± 5.96	31.44 ± 10.45
Control	93	-15.43 ± 2.42	-19.83 ± 4.09	45.43 ± 6.12
t value		8.969	6.684	11.194
P value		0.000	0.000	0.000

CS: Circumferential strain; LS: Longitudinal strain; RS: Radial strain.

Table 3 Interaction between the left ventricular ejection fraction and left ventricular strain

Independent variable	Model	R2
LS	y = -2.5269x + 17.285	0.9805
CS	y = -1.6514x + 21.462	0.9836
RS	y = 0.9325x + 16.356	0.9848

CS: Circumferential strain; LS: Longitudinal strain; RS: Radial strain.

Table 4 Left ventricular function of participants with different degrees of coronary stenosis

Gensini score	Participants	LVEF, %	LVESV, mL	LVEDV, mL
< 5	12	54.93 ± 8.12	70.94 ± 15.34	125.49 ± 17.43
5–< 25	41	45.67 ± 7.92	85.21 ± 17.83	142.85 ± 12.93
≥ 25–< 60	36	40.88 ± 8.87	95.09 ± 13.21	155.93 ± 16.54
≥ 60	8	35.39 ± 9.05	102.17 ± 11.09	164.23 ± 13.82
F value		11.755	10.027	17.025
P value		0.000	0.000	0.000

LVEDV: Left ventricular end-diastolic volume; LVEF: Left ventricular ejection fraction; LVESV: Left ventricular end-systolic volume.