Overview
The two types of cells that control your heartbeat.
What is conducting and muscle cells?
The five conduction system structures.
What is the Sinoatrial (SA) node, the Atrioventricular (VA) node, the Bundle of His, right and left bundle branches, and the Purkinje fibers?
True or False: A bundle branch block can cause arrhythmia.
True; a block in the Purkinje fibers on a side of the heart can cause arrhythmia.
True or False: Most heart conduction system problems are from lifestyle habits.
False; most problems are genetics, but healthy lifestyle habits can keep the heart doing well for longer.
The most common way to check a heart rhythm.
What is an electrocardiogram (EKG)?
What does the conducting system provide the heart?
What is the automatic rhythmic beat?
The heart's natural pacemaker and its location.
What is the SA node and the right atrium?
True or false: atrial fibrillation is an arrhythmia or an irregular heart rhythm
True
Common symptoms that may indicate an issue with one's cardiac conduction system.
What is chest pains, heart palpitations, fainting, shortness of breath, and fatigue?
A way to look at heart activity for a longer period of time.
What is a heart monitor?
What must be operate in synchrony to pump the heart effectively?
What is the systemic and the pulmonary circulations?
The function of the AV node.
What is delaying the SA node's electrical signal to ensure that your atria are empty before the contraction stops?
A severe malfunction in the heart which causes the heart to stop. Without treatment, this condition is fatal.
What is cardiac arrest?
Some causes of SA node and AV node dysfunctions.
What are medications, metabolic and electrolyte status, and pathological conditions?
True or False: All cardiac tests are invasive.
False; Most cardiac tests are invasive and many can be worn in the comfort of your own home.
True or False: Cardiac muscle fibers form multiple units to ensure the atrial chambers and the ventricles contract differently
False; the cardiac muscle fibers form one unit to ensure that the atrial chambers contract together and ventricles contract at the same time
The way the left and right bundle branch connects the Bundle of His to the Purkinje fibers.
What is the left bundle sends electrical signals through the left ventricle and the right bundle sends electrical signals to the right ventricle?
The impaired electrical signals between your heart's atria and ventricles.
What is a heart block?
Can increase or decrease SA nodes and AV nodes functions.
What are medications?
A device a patient wears for 24 to 48 hours to detect electrical activity in the heart.
What is a Holter monitor?
The three stages of the cardiac cell cycle?
What is polarized state, depolarized state, and repolarized state?
The sequence of electrical events during one full contraction of the heart muscle.
What is an excitation signal is created by the SA node, the wave of excitation spreads across the atria to contract, the signal is delayed by the AV node, the signal is conducted to the bundle of His, then the bundle of His and the Purkinje fibers spread the wave impulses along the ventricles which make them contract?
The difference between Long QT syndrome and premature ventricular contractions.
LQTS contract and release too slowly while premature ventricular contractions happen too early causing a heart palpitations.
When you should really visit a provider for these symptoms.
What is chest pains, heart palpitations, and fainting?
An extensive test done that determines the heart rhythm that tests what kind of arrhythmia, what's the cause, which part of the heart, and even how well medications are working.
What is an electrophysiology study?