Roughly how long does ventricular diastole last?

1. Ventricular relaxation follows repolarisation, shown by the T wave. 2. It also divides into two distinct phases and lasts approximately 430 ms. 3. That makes diastole the longest single stretch of the cardiac cycle at rest. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.3 | Cardiac Cycle_