Heart Conduction System
What is known as the pacemaker of the heart?
What is the sinoatrial (SA) node
EKG machines record the heart's ______________________ activity.
What is electrical?
Name the different letters used to describe an EKG waveform.
What is P QRS T
dysrhythmia characterized by a heart rate less than 60/min
What is bradycardia?
This enzyme, often elevated after a myocardial infarction, is commonly used in the diagnosis of a heart attack due to its role in muscle cell injury.
What is a troponin?
The movement of electrical signals through the heart is called ___________________.
What is cardiac conduction?
Pads that conduct electricity that are attached to a patient are called ____________________.
What is electrodes.
The hearts electrical activity during a P wave is known as what?
What is atrial depolarization?
dysrhythmia with a heart rate greater than 100/min and one P wave preceding each QRS complex.
What is sinus tachycardia?
This type of myocardial infarction is characterized by ST-segment elevation in two or more contiguous leads and is usually caused by a complete coronary artery blockage.
Answer: What is STEMI?
Depolarization normally causes the heart muscle to ___________________.
What is contract.
EKGs do not provide information about the __________________ activity of the heart.
What is mechanical
What electrical activity is occuring during the QRS complex?
What is ventricular depolarization?
rapid, disorganized firing of multiple sites within the atrial tissue. This results in lots of fibrillatory waves between QRS complexes. It also results in an irregular QRS rhythm
What is atrial fibrillation?
The initial treatment for STEMI that is used to dissolve a clot in the coronary artery and restore blood flow is known as this.
Answer: What is thrombolytic therapy (or fibrinolysis)?
Repolarization normally causes the heart muscle to _______________________.
The EKG machine measures the electrical activity between different sets of electrodes to examine different areas of the heart. These different "views" are called __________.
What is leads.
Which part of the EKG corresponds to atrial depolarization?
What is the P-wave?
regular, fast rhythm characterized by large, irregular, wide QRS complexes on the EKG. Typically, P waves are absent, not visible, or occur randomly
What is ventricular tachycardia?
In this condition, a depressed ST-segment is often seen on the EKG, typically indicating an area of the heart that is not receiving adequate oxygen, but has not yet progressed to infarction.
Answer: What is ischemia?
Cardiac conduction follows a specific pathway. What is the order of the pathway?
What is SA node, AV node, AV bundle (bundle of his), Right and Left Bundle Branches, Purkinje Fibers
A typical 12-lead EKG has how many "lead wires"?
what is 10?
What is the mechanical activity occurring during the QRS complex?
What is "contraction of the ventricles."
complete absence of any waves on the EKG tracing
What is asystole?
This abnormality on the EKG, often seen after a myocardial infarction, represents irreversible myocardial damage and typically appears several hours after the event.
Answer: What is a pathological Q-wave?