atrial septal defect a hole in the wall of the heart (septum) that divides the left and right atrium.
autograft a tissue graft transferred from one part of the patients
body to another part. automaticity the ability to generate a spontaneous action
potential.
B
blastula usually spherical body produced by cleavage of a ferti¬lized ovum, consisting of a single layer of cells (blastoderm) surrounding a fluid-filled cavity (blastocele).
brachial artery the artery of the arm and forearms that supplies blood to the upper limb including the hands.
bradycardia heart rate less than 60 beats a minute.
Brugada P. Brugada described the syndrome and its electro-cardiographic changes.
C
calorie a unit of energy; one calorie represents the amount
of heat required to raise the temperature of one kilogram of
water by one degree. capillaries fine, thin-walled blood vessels that branch from
arterioles and feed the tissues and cells with blood and fluids. capillaries minute, thin-walled blood vessels which connect the
arterioles and the venules, forming a network in nearly all
organs and tissues of the body. cardiac arrest cessation of the heartbeat. cardiac catheterization a cardiac catheter is inserted through a

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