Individual PAWP profiles of nicorandil following administration to acute heart failure patients. Left upper panel: bolus injection of nicorandil at a dose of 4, 8, 12 and 18 mg kg−1. Right upper panel: 6 h or 24 h infusion of nicorandil at a dose of 50, 100, 150, 200 and 250 µg kg−1 h−1 following a bolus injection of nicorandil at a dose of 200 µg kg−1 h−1. Left lower panel: 48 h infusion of nicorandil at a dose of 200 µg kg−1 h−1 following a bolus injection of nicorandil at a dose of 200 µg kg−1