Physiology Isometric relaxation is defined as A Relaxation of both atria B Relaxation of both atria with all valves open C Relaxation of LV with mital and aortic valve closed D Relaxation of LV with mital and aortic valve open 💡 Explanation Isometric relaxation is defined as ✓ Correct Answer: C. Relaxation of LV with mital and aortic valve closed