,
circulation,
and sports medicine)
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)
composes the cardiac valves (valves that control the flow of blood
through and from the heart)
)
: the muscle of the heart, comprising the chief component of the myocardium
and lining the walls of the large vessels joined to the heart; it is composed
of fibers of striated but involuntary muscle. The composition and organization
of its fibers resemble those of skeletal muscle, but instead of forming
a syncytium, its branched, mononucleate cells are linked end to end by
intercalated disks that provide both mechanical and ionic coupling for
coordination of the entire muscle)).
between them and thus conduct impulses rapidly), occurring as an interlaced
network in the subendocardial tissue and constituting the terminal ramifications
of the conducting system of the heart. The term is sometimes used loosely
to denote the entire system of conducting fibers (15 < HR < 40 bpm;
conduction rate = 4,000 mm/s)))
analogous to the zonula adherens but occurring in cardiac myocytes, primarily
in the transverse portions of intercalated disks; it has multiple dense
attachment plaques acting as sites of insertion of actin filaments into
the sarcolemma and thus linking the cellular membrane and contractile apparatus
with those of adjacent cells.)
: the fibroserous sac that surrounds the heart and the roots of the great
vessels. Pericardial fluid < 100 mL. The base of the pericardium is
attached to the central tendon of the diaphragm
and echocardiography)
Copyright © 2001-2014 Daniele Focosi.
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