Figure 1: Sarcomere length-tension relationships in porcine skinned ventricular cardiac myocyte preparations. (a) Muscle cell preparations were mounted between a force transducer and motor, calcium activated to yield ~50% maximal force, then isometric force was measured over a range of sarcomere lengths monitored using an IonOptix SarLen system. (b) Histogram showing the slopes of length-tension relationships obtained in porcine cardiac myocytes.