Document Classification

Section Type: RESULTS

Text: When Ca2 + was 1. 34 + / - 0. 03 mmol/L, Vcfc, calculated at a common level of afterload (sigma es = 50 g/cm2), was 1. 01 + / - 0. 05 cir/sec ; at low Ca2 + (1. 02 + / - 0. 02 mmol/L), Vcfc fell to 0. 89 + / - 0. 04 cir/sec (P less than 0. 001 compared with medium) ; at high Ca2 + (1. 68 + / - 0. 07 mmol/L) Vcfc rose to 1. 10 + / - 0. 03 circ/sec (P less than 0. 001 compared with medium and low).