Cardiac Terms
The ability of pacemaker cells to generate or initiate their own electrical impulse
Automaticity
This will initiate an electrical impulse that travels downward toward the muscle of both atria
SA Node
This dysrhythmia occurs when all electrical impulses originate from the SA node and follow the normal conduction pathway but it is slow
Sinus bradycardia
What is the treatment of choice (drug) for Torsades de Pointes
Magnesium
Which term is defined as the length the cardiac cell is stretched prior to the next cardiac contraction
Preload
The phase of cardiac contraction when the cardiac cells have transmitted an electrical impulse usually causing the cardiac muscle to contract
Depolarization
In a normal rhythm the SA node generates how many electrical impulses per minute
60-100
Thi arrythmia is triggered by an irritable focus within the atria. The irritability can be caused by stimulants, nicotine, or street drugs
Supraventricular tachycardia
This drug relieves cardiac chest pain and HTN by relaxing and dilating smooth muscle in blood vessels including coronary arteries
Nitroglycerin
The amount of blood pumped out of the heart per minute
Cardiac output
This is the recovery phase the muscle has contracted and the cells are returning to a ready state
Repolarization
This represents the time it takes an electrical impulse to be conducted through the atria and the AV node until it causes ventricular depolarization
PR interval
This occurs when a single site in the atria initiates many electrical impulses at a rapid rate, so fast that normal P waves are not found
Atrial flutter
This drug removes excess fluid from tissues and increases formation of urine
Furosemide
What term refers to the resistance a ventricle faces during ejection
Afterload
This is the phase of readiness- cells are ready to receive an electrical impulse
Polarization
This represents ventricular depolarization or the conduction of an electrical impulse from the bundle of HIS through the Ventricular muscle
QRS complex
In this abnormality there is increased irritability of all the cardiac cells in the atria
Atrial fibrillation
This drug increases rate and force of contractions, increases coronary blood flow. It is used for CPR during cardiac arrest, V-fib or asystole
Epinephrine
According to the EKG and Wiggers diagram S1 coincides with the?
T-wave
This cardiac system prepares the body to react in times of stress or emergencies
Sympathetic nervous system
This follows the ST segment and indicates the repolarization of the ventricular myocardial cells
T wave
This arrhythmia originates from a single sire in the ventricles at a rate of 101-250 eloectrical impulses per minute
Ventricular tachycardia
This drug increases the force and rate of contraction of heart muscle, increasing cardiac output and increasing coronary artery blood flow. Also used for short term treatment of heart failure
Dobutamine
How does dysynchrony appear on an m-mode of the LV
Septal to posterior wall delay