Table 4.

Exercise Physiological Parameters in Relation to RV Function

	Overall (n=2051)	RV Dysfunction − (n=1928)	RV Dysfunction + (n=123)	p
Effort Tolerance
Exercise Duration (time)	7.8 ± 2.9	7.9± 2.9	6.7 ± 2.8	<0.001
Peak Treadmill Stage Achieved	2.6 ± 0.96	2.6 ± 0.96	2.2 ± 0.91	<0.001
Workload (METS)	9.4 ± 2.1	9.5 ± 2.1	8.5 ± 2.3	<0.001
Heart Rate
Rest	70.4 ± 12.3	70.3 ± 12.2	72.1± 13.3	0.15
Peak Stress	138.4 ± 25.2	139.1 ± 25.0	128.3± 26.9	<0.001
Change in Heart Rate (stress - rest)	68.0 ± 24.4	68.8 ± 24.1	56.2± 26.4	<0.001
Predicted maximum heart rate	156.5±11.7	156.7 ± 11.7	154.0± 11.5	0.014
% Converted to pharm stress testing*	415 (20%)	372 (19%)	43 (35%)	<0.001
Systolic Blood Pressure
Rest	126.4 ± 17.0	126.3 ± 16.9	127.7 ± 18.0	0.40
Peak Stress	166.6 ± 29.2	167.3 ± 28.4	155.5 ± 32.3	0.001
Change in Blood Pressure (stress - rest)	40.2 ± 27.7	41.0 ± 27.3	27.9 ± 31.0	<0.001
Exercise ECG Response
≥ 1 mm ST Depression (%)	389 (19%)	371(19%)	18(15%)	0.21
Maximal ST Depression (mm)	0.32 ± 0.75	0.33 ± 0.74	0.30 ± 0.84	0.67
Exercise Clinical Response
Chest pain	104(5%)	94 (5%)	10(8%)	0.11
Shortness of breath	273(13%)	254 (13%)	19 (15%)	0.47
Duke Treadmill Score	4.9 ±5.5	5.0 ± 5.4	4.2 ± 6.5	0.13

^*Failure to attain target heart rate (220-age)