Cardiac Resynchronization Therapy Reduces Metaboreflex Contribution to the Ventilatory Response in Heart Failure Population

Table 3

Comparison of exercise data before and after CRT. Values are given as means ± SEM. AT, anaerobic threshold; BP, blood pressure; CP, circulatory power. ^∗𝑃<0.05 compared with baseline.

	Before CRT	After 6-month followup
Heart rate at rest (/min)	69±11	70±7
Peak heart rate (/min)	114±25	116±19
Peak systolic BP (mmHg)	150±30	168±31^∗
Maximal workload (Watts)	80±25	93±23
Peak VO2 (mL/kg/min)	14±4	16.5±3^∗
Time to AT (seconds)	163±94	195±69
VE at rest (L/min)	12±3	13±3
Peak VE (L/min)	51±17	54±14
Peak VCO2/VO2	1.31±0.18	1.2±0.1
VE/VCO2 slope	39±10	33±10^∗
Peak CP (mL/kg/min·mmHg)	2320±821	2770±791^∗
Duration of exercise (seconds)	474±156	552±142