Anatomy
What is Excitability
Electrolyte that has massive influx into cell and is responsible for depolarization
What is Sodium (Na+)
This node is located in the right atrium, and generally fires at a rate of 60-100
What is the SA node?
A small box on the horizontal plane of the EKG paper represents?
0.4 sec
Myocardium
What is the heart muscle?
Valve between Left atrium and Left ventricle?
What is bicuspid or mitral valve?
This is another word for contraction.
What is systole?
Once the electrical impulse of the heart travels through the AV node and AV junction it goes here.
What is the bundle of his?
Lead I, II, III
Bipolar limb leads
Has a pacing rate of 20-40 beats per minute.
What is the purkinje fibers?
What is the artery that carries oxygenated blood from the left ventricle to the body.
What is the Aorta?
The electrical impulse of the heart ends in a network of nerves in the right and left ventricles known as this.
What is the Purkinje fibers?
This node connects the atria and ventricles and fires at a rate of 40-60.
What is the AV node?
Lead aVR, aVL, aVF
What is unipolar augmented limb leads
What is the cessation of mechanical activity of the heart?
What is Cardiac Arrest?
The Left coronary artery is divided into what branches?
What is the Left Circumflex and Left anterior descending?
The process of discharging resting cardiac muscle fibers by means of electrical impulse causing the muscle fibers to contract
What is depolarization?
Cardiac cells are unable to respond to any stimulus.
What is Absolute refractory period?
T wave on a ekg represents
What is repolarization
Nerve that integrates the SA node and controls heart rate through he parasympathetic nervous system.
What is the Vagus nerve?
Which vessels perfuse the Left Ventricle?
LCX, LAD and the Right Posterior Descending.
Maintains depolarization during phase 2 of the Cardiac action potential.
What is Calcium?
Known as the gate keeper and regulates number of impulses reaching the ventricles
What is the AV junction?
Relative Refractory period is represented on your EKG by?
The downlope of the T wave.
An impulse moving torward a positive electrode would produce a __________________________ deflection on the ekg.
Positive