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4.2 key terms (heart rate (The number of heartbeats per unit of time,…
4.2 key terms
heart rate
The number of heartbeats per unit of time, usually per minute. The heart rate is based on the number of contractions of the ventricles
pulse
a rhythmical throbbing of the arteries as blood is propelled through them, typically as felt in the wrists or neck.
Carotid pulse
The carotid sinus, or carotid bulb, is a widening of a carotid artery at its main branch point. The carotid sinus contains sensors that help regulate blood pressure. The carotid artery pulse can normally be felt in the neck by pressing the fingertips against the side of the windpipe, or trachea
Radial pulse
pulse of the radial artery (felt in the wrist) Type of: heart rate, pulse, pulse rate. the rate at which the heart beats; usually measured to obtain a quick evaluation of a person's health.
blood pressure
the pressure of the blood in the circulatory system, often measured for diagnosis since it is closely related to the force and rate of the heartbeat and the diameter and elasticity of the arterial walls.
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diastolic pressure
The diastolic pressure is specifically the minimum arterial pressure during relaxation and dilatation of the ventricles of the heart when the ventricles fill with blood. In a blood pressure reading, the diastolic pressure is typically the second number recorded.
systolic pressure
It is specifically the maximum arterial pressure during contraction of the left ventricle of the heart. The time at which ventricular contraction occurs is called systole. ... For example, with a blood pressure of 120/80 ("120 over 80"), the systolic pressure is 120. By "120" is meant 120 mm Hg (millimeters of mercury).
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Sphygmomanometer
an instrument for measuring blood pressure, typically consisting of an inflatable rubber cuff that is applied to the arm and connected to a column of mercury next to a graduated scale, enabling the determination of systolic and diastolic blood pressure by increasing and gradually releasing the pressure in the cuff.
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Sinoatrial (SA) node
a small body of specialized muscle tissue in the wall of the right atrium of the heart that acts as a pacemaker by producing a contractile signal at regular intervals.
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Bundle branches
The bundle branches, or Tawara branches, are offshoots of the bundle of His in the heart's ventricle. They play an integral role in the electrical conduction system of the heart by transmitting cardiac action potentials from the bundle of His to the Purkinje fibers.
purkinje fibers
Purkinje fibers are a unique cardiac end-organ. Further histologic examination reveals that these fibers are split in ventricles walls. The electrical origin of atrial Purkinje fibers arrives from the sinoatrial node.
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