Table 2.

Changes in myocardial enzymogram and NT-proBNP before and after head down tilt position.

	CK (U/L)		CKMB (U/L)		LDH (U/L)		NT-ProBNP (pg/mL)
	Before	After	Before	After	Before	After	Before	After
Case 1	65	63	10	15	197	184	20.55	19.03
Case 2	75	70	12	14	207	204	50.92	90.08
Case 3	129	136	15	13	222	236	1,840.31	1,732.67
Case 4	106	107	18	21	172	164	31.22	33.04
Mean ± SD	93.75 ± 29.27	94.00 ± 34.01	13.75 ± 3.50	15.75 ± 3.59	199.50 ± 21.01	197.00 ± 30.70	485.75 ± 903.12	468.71 ± 843.20
Paired t-test	t = −0.0976 p = 0.928		t = −1.359 p = 0.267		t = 0.426 p= 0.699		t = 0.540 p = 0.627

CK, creatine kinase; LDH, lactate dehydrogenase; NT-ProBNP, N-terminal pro-B type natriuretic peptide.