Impact of Hydrostatic Pressure Variations Caused by Height Differences in Supine and Prone Positions on Fractional Flow Reserve Values in the Coronary Circulation

Table 1

Patient characteristics.

	N = 23
Age (years)	64.8 ± 9.3
Male	19 (83%)
Hypertension	14 (61%)
Diabetes mellitus	8 (35%)
Dyslipidemia	12 (52%)
Smoking	5 (22%)
Family history	2 (9%)
Chronic kidney disease	4 (17%)
Hemodialysis	0 (0%)
Congestive heart failure	1 (4%)
Old myocardial infarction	10 (43%)
Previous PCI	8 (35%)
Previous CABG	2 (9%)
EF (%)	62.1 ± 12.3
Peripheral artery disease	0 (0%)
Old cerebral infarction	1 (4%)
COPD	0 (0%)
Number of disease vessels
0	1 (4%)
1	10 (43%)
2	12 (52%)
3	0 (0%)
Medication
Antiplatelet agent	14 (61%)
Anticoagulation	2 (9%)
Beta-blocker	6 (26%)
Renin-angiotensin system inhibitors	10 (43%)
Statin	14 (61%)
Calcium channel blocker	6 (26%)
Oral diabetes drugs	3 (13%)
Insulin	1 (4%)

Data are expressed as mean ± SD and numbers (%). COPD, chronic obstructive pulmonary disease; EF, ejection fraction; PCI, percutaneous coronary intervention; CABG, coronary artery bypass graft.