 In disease, Ca sparks fail to terminate, causing a diastolic Ca leak that decreases contraction amplitude and increases the risk of arrhythmia.
<clarity>  In disease, Ca sparks fail to terminate, causing a diastolic Ca leak that decreases contraction amplitude and increases the risk of arrhythmia.
 In disease, Ca sparks fail to terminate, causing a diastolic Ca leak that decreases contraction amplitude and increasing risk of life-threatening arrhythmia.