Cardiac intercalated discs were disintegrated .
Sarcomeres were irregularly shapen , and intracellular accumulation of aberrant isolated myofibrillar bundles and Z - disc components was also observed .
Cardiac intercalated discs were disintegrated and sarcomeres were irregularly shapen , and intracellular accumulation of aberrant isolated myofibrillar bundles and Z - disc components was also observed .