C
The ST segment sits at ___________ for a normal patient
What the level of the isoelectric line?
Sympathetic nerves are regulated primarily by
What is norepinephrine?
is composed of the AV node and surrounding tissue.
What is the AV junction?
atrial depolarization
what is the P wave
Thousands of fibrils that are distributed throughout the ventricles, which represent the end of the cardiac conduction system, are called the:
What are the Purkinje fibers?
Stimulation of alpha and beta receptors affects the:
What is the heart, lungs, and blood vessels?
Stimulation of the parasympathetic nervous system:
What is slows SA nodal discharge and decreases conduction through the AV node?
_________ will outpace any slower conduction tissue.
What is the SA node?
The amount of blood that is pumped out by either ventricle per minute is called:
What is cardiac output?
The area of conduction tissue in which electrical activity arises at any given time is called the:
What is pacemaker?
The S1 heart sound represents:
What is the closure of the mitral and tricuspid valves?
The ability of the heart to vary the degree of its contraction without stretching is called
What is contractility?
Under normal conditions, the strength of cardiac contraction is regulated by
What is Heart Rate?
To increase myocardial contractility and heart rate and to relax the bronchial smooth muscle, you must give a drug that stimulate ____________
What is beta-1 and beta-2 receptors?
The effect on the velocity of electrical conduction is referred to as the _________ effect.
What is dromotropic?
The PR interval should be no shorter than ____ seconds and no longer than ____ seconds in duration.
What is 0.12, 0.20?
The part of the blood vessel is made up of elastic fibers and muscle, and provides for strength and contractility.
What is Tunica media?
The electrolytes maintains the depolarization phase.
What is Calcium?
The coronary artery primarily supplies the right ventricle and inferior portion of the heart
What is the Right Coronary Artery?
Vasoconstriction occurs following stimulation of __________.
What is alpha receptors?
In order to ensure proper electrolyte distribution and maintain the polarity of the cell membrane, the sodium-potassium pump:
What is moves two K+ ions into the cell for every three Na+ ions it moves out of the cell?
The drug possesses beta-2-specific properties
What is Proventil?
What 2 drugs causes an increase in heart rate
What is Atropine and epinephrine?
These lead views on the 12-lead ECG view the inferior portion of the heart
What is II, III, and aVF?
These leads view the anterior surface of the heart
What is V3, and V4?