Relationship between left ventricular mechanical synchrony and left ventricular systolic function: a CZT-SPECT analysis

Table 2 Comparison of mechanical contraction synchrony parameters

Variables	Group 1	Group 2	Group 3	Group 4	F	P
PP (°)	138.2 ± 37.2	129.1 ± 20.5	123.4 ± 19.8	125.8 ± 20.3	5.20	0.002
PSD (°)	57.9 ± 18.9	41.3 ± 16.3	31.8 ± 19.4	15.3 ± 7.4	188.72	0.000
PHB (°)	184.3 ± 65.3	122.4 ± 60.1	86.1 ± 30.0	43.4 ± 15.1	202.88	0.000
HS	2.0 ± 0.5	2.8 ± 0.7	2.9 ± 0.6	4.0 ± 0.9	171.05	0.000
HK	4.6 ± 3.5	9.4 ± 5.2	9.3 ± 4.6	18.2 ± 8.8	101.36	0.000

Continuous variables are mean ± SD. Group 1, EF < 35%. Group 2, 35% ≤ EF < 45%. Group 3, 45% ≤ EF < 50%. Group 4, EF ≥ 50%
PP Peak phase, PSD Phase standard deviation, PHB Phase histogram bandwidth, HS Histogram skewness, HK Histogram kurtosis, Sig. Significance
*Statistically significant finding (P < 0.001)

ISSN: 1471-2261