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When the heart fails to pump sufficient blood around the body it tries to compensate by changing the rate and sometimes the strength of contractions. Pooling of blood in the organs and tissues of the body leads to signs of congestion.
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Cardiomyopathy is degeneration of the heart muscle so that the heart, which is basically a muscle pump progressively fails.
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Heart failure is the inability of the heart to maintain a circulation sufficient to meet the body's needs. Heart failure most usually describes a failure of the heart muscle (myocardial failure).
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Heartworm disease (dirofilariasis) is a serious and potentially fatal disease in dogs in many parts of the world. It is caused by a worm called Dirofilaria immitis.
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This tumour is a disordered and purposeless overgrowth of modified sebaceous glands known as the hepatoid glands. These glands only occur in dogs. T
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Hip dysplasia is a deformity of the hip which occurs during the growing period.
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Hookworms are parasites which get their name from the hook-like mouthparts they use to attach to the intestinal wall. Despite their small size, they suck large amounts of blood from the tiny vessels in the intestinal wall.
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Horner's syndrome is a common neurological disorder of the eye and facial muscles. The condition is usually sudden in onset.
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Hypocalcaemia is a term that refers to low blood concentrations of calcium. Calcium is an important electrolyte (chemical) within the body, and is needed for normal function of muscles and nerves.
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Hypocalcaemia means low circulating blood calcium. It is most commonly observed in eclampsia, or so-called milk fever, which may occur in bitches at any time during lactation or sometimes immediately before they whelp.