We used rectangle image fitting of decellularized heart images to obtain a heart shape index.
Median survival after a heart failure index admission ranged from about 1.5 years in those aged over 85, three years for those aged 80 85, 4 years for those aged 75 79 to even longer for those younger than 75.
The polyploidization of the myocardium in birds and mammals is correlated with a reduction in cardiac aerobic performance expressed by heart index (for birds, see Anatskaya and Vinogradov, [ 49]; for mammals, see Anatskaya and Vinogradov, [ 50]).
Where Organ Index (OX) may change as: Heart index (HX), Liver index (LiX), Spleen index (SX), Lung index (LuX), Kidney index (KX), Thymus index (TX), Brain index (BX).
Heart index was calculated as that the heart weight was divided by body weight.
Finally, the heart index (HI), reflecting heart functional capacity, was calculated as heart weight (g)/total weight (g) × 100.
The following body indexes reflecting investments in body condition, vitality, and reproduction were calculated: condition factor, spleen-somatic index, hepato-somatic index, gonado-somatic index, and heart index.
The heart index reflects heart functional capacity, i.e. aerobic performance, organ aerobic activity, and the animal's ability to engage in physical activity.
The low heart index in the triploid gynogenetic females of C. auratus complex may indicate low functional capacity (probably low aerobic performance).
Higher aerobic performance expressed by the heart index and higher oxygen-carrying capacity were found in sexual males, with increasing values before and during spawning.
