ventricular septal defect a hole in the septum, that divides the
left and right ventricles. visceral adiposity marked accumulation of fat that covers the
abdominal organs, often termed abdominal obesity; the fat
around the waistline also covers the internal organs within
the abdomen.
W
wall tension force exerted on the vessel or chamber wall acting to pull it apart in a circumferential direction; it is a function of the radius and the pressure within the lumen or chamber.
Wolff-Parkinson-White syndrome characterized by premature excitation of the ventricles due to an anomalous conduction bypass tract between the atria and ventricles; often leads to rapid heart rates.
X
xenobiotic compound that is foreign to the body, such as a drug or an environmental pollutant.

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