Age dependence of pulmonary artery blood flow measured by 4D flow cardiovascular magnetic resonance: results of a population-based study

Table 3 Landmarks of the cardiac cycle

	Group 1 (20–39y.) n = 43	Group 2 (40–59y.) n = 44	Group 3 (60–80y.) n = 39	F(2,375)	p-value
TTP_sys, %(±SD)
MPA	17.25 ± 3.58	15.31 ± 3.02	15.38 ± 3.20	6.70	0.011*
LPA	17.32 ± 6.29	14.65 ± 2.46	15.47 ± 2.50	3.97	0.049*
RPA	18.23 ± 3.52	16.24 ± 2.62	16.56 ± 7.92	2.20	0.140
AAo	15.06 ± 4.59	14.89 ± 5.48	13.46 ± 2.70	2.62	0.108
TTP_ret, %(±SD)
MPA	43.52 ± 7.45	43.16 ± 5.91	43.53 ± 4.63	0.00	0.994
LPA	45.26 ± 8.30	44.52 ± 8.29	50.97 ± 13.58	6.37	0.013*
RPA	46.69 ± 10.01	49.02 ± 13.89	49.97 ± 13.65	1.38	0.242
AAo	41.18 ± 9.614	39.51 ± 6.17	40.6 ± 4.33	1.40	0.709
TTP_dia, %(±SD)
MPA	59.85 ± 9.296	59.37 ± 6.307	60.53 ± 8.112	0.15	0.701
LPA	61.06 ± 8.991	60.99 ± 7.276	66.76 ± 10.14	8.54	0.004*
RPA	61.72 ± 10.15	62.63 ± 9.908	63.11 ± 10.83	0.38	0.54
AAo	55.71 ± 10.03	57.76 ± 7.792	61.96 ± 9.991	9.26	0.003*

Time-to-peak (TTP) values in % of the cardiac cycle for peak antegrade systolic (TTP_sys) and diastolic (TTP_dia), and early diastolic retrograde flow (TTP_ret). SD standard deviation. *statistically significant

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