Table 1.

Baseline demographics and preoperative characteristics of patients

	Group K	Group P
N	15	15
Age (y)	60.3 ± 2.7	58.8 ± 2.2
Weight (kg)	77.9 ± 2.5	78.5 ± 2.9
Body surface area (m2)	1.87 ± 0.12	1.88 ± 0.14
Sex (F/M)	4/11	3/12
LVEDP (mmHg)	9.5 ± 2.9	9.3 ± 3.1
Canadian Class II/III/IV	1/10/4	5/6/4
Medications n (%)
Nitrates	10 (66.6 %)	11 (73.3 %)
Beta-blockers	7 (46.6 %)	9 (60 %)
Calcium channel blockers	4 (26.6 %)	3 (20%)
Anti-hypertensive	1 (6.6 %)	1 (6.6 %)

LVEDP: left ventricular end-diastolic pressure. Data are presented as mean ± SD or number of patients.