Cardiac Anatomy
What are the upper chambers of the heart?
What is the Atria
The ability of cardiac cells to generate their own electrical impulses
What is automaticity
The first deflection of the cardiac cycle
What is the P wave
This type of rhythm is characterized by a rate of 40-60, regular rhythm, normal P wave and QRS complex
What is sinus bradycardia
This is an early beat originating from an ectopic site in the atrium
What is a Premature Arial Contraction (PAC)
What are the lower chambers of the heart?
What is the Ventricles
The ability of cardiac cells to cause cardiac muscle contraction
What is contractility
This part of the ECG waveform represents ventricular repolarization
What is the T wave
This rhythm is regular has a rate above 100 and normal P and T waves
What is Sinus Tachycardia
This rhythm is a rapid, regular rhythm between 150-250 beats per minute
What is paroxysmal atrial tachycardia or supraventricular tachycardia (SVT)
The inner layer of the heart?
What is the endocardium
The inherent rate of this node is 60-100 beats per minute.
What is the sinoatrial node (SA)
This interval should be less than half of the R-R interval
What is QT interval
This is the rate of sinus rhythm
What is 60-100 beats per minute
This rhythm can be regular or irregular the P wave has sawtooth deflections or flutter waves.
What is Atrial Flutter
Which chamber pumps oxygen-rich blood to the rest of the body
What is the left ventricle
These fibers are the termination of the bundle branches and distribute the electrical impulse throughout the ventricles.
What are purkinje fibers
This part of the ECG waveform should measure 0.10 seconds or less
What is the QRS complex
These 2 terms refer to rhythm where the sinus node suddenly fails to initiate an impulse
What are sinus pause, sinus arrest, and sinus block
What provides up to 30% of ventricular filling
What is atrial kick
The fluid-filled sac that surrounds and protects the heart.
What is the pericardium
The electrical impulse normally follows this sequence through the heart.
What is SA Node → AV Node → Bundle of His → Right & Left Bundle Branches → Purkinje Fibers?
This is the point where the QRS complex meets the ST segment
What is the J point
This is the only sinus rhythm that is irregular
What is sinus arrhythmia
This rhythm is grossly irregular wave deflections called fibrillatory waves affect the entire baseline
What is Atrial Fibrillation (Afib)