Exploratory assessment of right ventricular structure and function during prolonged endurance cycling exercise

Table 1 Right ventricular structural and functional indices during exercise

Variable	Baseline	2-h	4-h	6-h
Heart rate (beats.min⁻¹⁾	60 ± 10	131 ± 12^ɣ	134 ± 16*	146 ± 27^ʘ
RVOT_plax (mm)	30 ± 3	31 ± 2	32 ± 3	33 ± 3
RVOT1 (mm)	32 ± 4	33 ± 6	34 ± 4	33 ± 5
RVOT2 (mm)	22 ± 3	22 ± 3	24 ± 2	23 ± 2
RVD1 (mm)	46 ± 5	47 ± 3	49 ± 5	47 ± 5
RVD2 (mm)	28 ± 5	28 ± 4	29 ± 3	30 ± 4
RVD3 (mm)	85 ± 10	89 ± 6	90 ± 4	89 ± 4
RVAd (cm²)	26.4 ± 4.7	27.0 ± 2.7	28.5 ± 3.8	27.9 ± 3.1
RVAs (cm²)	12.9 ± 1.7	13.3 ± 2.5	13.2 ± 1.6	13.8 ± 1.8
RVFAC (%)	50.6 ± 6.0	50.9 ± 5.4	53.5 ± 6.2	50.5 ± 6.2
TAPSE (mm)	28 ± 3	32 ± 2	35 ± 4*	32 ± 3
RV S’ (cm/s)	17 ± 3	34 ± 6^ɣ	31 ± 7*	32 ± 5^ʘ
RV E’ (cm/s)	17 ± 41	20 ± 4	20 ± 6	20 ± 9
RV A’ (cm/s)	13 ± 3	29 ± 4^ɣ	34 ± 3*	34 ± 2^ʘ
PASP (mmHg)	17 ± 10	20 ± 9	21 ± 9	26 ± 9
TR velocity (m/s)	1.9 ± 0.5	2.1 ± 0.2	2.1 ± 0.6	2.4 ± 0.2
RV wall stress (kdynes/cm²)	6.2 ± 2.4	5.8 ± 3.4	5.5 ± 2.2	7.1 ± 3.0

One-way repeated measures ANOVA, statistical significance indicated as ɣ = baseline to 2 h, ^* = baseline to 4 h, ʘ = baseline to 6 h. Data are mean ± SD, N = 8, except for RVOT_plax where n = 7. Baseline data were obtained with participants sat upright on the bike

ISSN: 2055-0464