Table 1.

St. Thomas and del Nido cardioplegic solutions

ST cardioplegia	Original	Pseudo*
Na+	110 mmol/l	-*
K+	16 mmol/l	6 cc (2 meq/ml)
Mg2+	16 mmol/l	50%, 2.5 cc
Ca2+	1.2 mmol/l	-*
NaHCO3-	10 mmol/l	8.4%, 7.5 cc
Lidocaine	-	1%, 2.5 cc
DN cardioplegia	Original	Pseudo**
Mannitol	20%, 16.3 ml, 3.26 g	20%, 8 cc
Magnesium sulfate	50%, 4 ml, 2g	50%, 2.5 cc
Sodium bicarbonate	8.4%, 13 ml, 13 mEq	8.4%, 6.5 cc
Lidocaine	1%, 13 ml, 130 mg	2%, 3cc
Potassium chloride (2 mEq/ml)	13 ml, 26 mEq	6.5 cc (2 meq/ml)

^*This cardioplegic solution was solved in a 0.5 l ringer (containing 73 Eq Na+, 2 Eq K+, 2 Eq Ca+, 77 Eq Cl-);

^**This cardioplegic solution was solved in a 0.5 l normal saline (containing 77 Eq Na+, 77 Eq Cl-)