Cardiovascular disorders

Chapter 6 Cardiovascular disorders




Introduction


This chapter is short not because cardiovascular disorders are uncommon, but because many conditions are illustrated in other chapters. Three basic cardiac syndromes encompass most disorders: the first is congestive cardiac failure, which may result from valvular disease (6.4), myocardial or pericardial disease (6.56.8), hypertension, or congenital defects which produce shunts (1.301.32). Secondly, and less commonly, acute heart failure can result from tachyarrhythmia caused by a nutritional deficiency myopathy (e.g., copper or selenium), electrocution or lightning strike (classified under nervous disorders, 9.419.44), or bradycardia due to plant poisoning by Solanum, Trisetum and Lantana species, all of which can induce myocardial changes (13.1313.16). Thirdly, peripheral circulatory failure can result from vasodilatation and a reduced circulating blood volume as in septic shock (e.g., acute gangrenous mastitis and acute metritis), or endotoxic shock from a peracute coliform mastitis (11.411.9). Peripheral circulatory failure can also be due to hematogenic failure as a result of severe hemorrhage (see 5.34), or as a consequence of neonatal calf diarrhea (2.162.24).


Jul 8, 2016 | Posted by in SUGERY, ORTHOPEDICS & ANESTHESIA | Comments Off on Cardiovascular disorders
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