The Tei index as an expression of right ventricular impairment and recovery: investment grade or subprime?

The mechanics of a normal ventricular contraction are precise. The cardiac cycle can be divided into the cyclical sequence of systolic ejection, isovolumic relaxation, diastolic filling, isovolumic contraction, and the next systole. This sequence is mediated by a chain of high-energy steps that include the rapid intracellular recycling of calcium ions within the contractile proteins; the timing of the components of the cycle is reflective of the health of myocardial cells and their coordinated response to loading conditions and contractile state.