Electrophysiology through the heart
This wave on an ECG represents the electrical depolarization and contraction of the atria.
What is the P wave?
This baseline heart rhythm features regular P waves, a normal PR interval, and a resting rate bewteen 60-100bpm.
What is Normal Sinus Rhythm (NSR)?
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What is Normal Sinus Rhythm?
The flatline rhythm represents the total absence of electrical and mechanical activity in the heart.
What is Asystole?
This heart block is characterized solely by a prolonged PR interval greater than 0.2 sec that remains constant with every beat.
What is First-Degree AV Block?
This wave on a standard EKG represents ventricular repolarization.
What is the T wave?
This sinus rhythm originates normally from the SA node but features a heart rate >100 bpm?
What is Sinus Tachycardia?
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This totally disorganized ventricular rhythm causes the heart muscle to quiver, generates no pulse, and requires immediate defibrillation.
What is Ventricular Fibrillation (V-Fib)?
This type of AV block is characterized by progressive lengthening of the PR interval until the ORS complex is completely dropped.
What is Second-Degree AV Block, type 1 (Mobitz I or Wenckebach)?
This complex on an EGC represents ventricular depolarization and hides the electrical signature of atrial repolarization.
What is the QRS complex?
This slow rhythm is characterized by a normal sinus configuration but a heart rate that falls <60 bpm.
What is Sinus Bradycardia?
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What is Atrial Flutter?
This critical, life-saving machine is used to deliver an electrical shock to reset the heart during V-Fib or pulseless V-Tach.
What is a Defibrillator?
This second-degree heart-block drops QRS complexes randomly, the PR intervals of the conducted beats remain constant.
What is Second-Degree AV Block, Type 2 (Mobitz II)?
Known as the primary pacemaker of the heart, this specialized group of cells inherently fires electrical impulses at a rate of 60 - 100 bpm.
What is the Sinoatrial (SA) node?
This benign sinus variant features an irregular rhythm that characteristically speeds up during inspiration and slows down during expiration.
What is Sinus Arrhythmia?
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What is Ventricular Fibrillation?
A deficiency in this major intracellular cation can put a patient at high risk for life-threatening arrhythmias, such as Torsades de Pointes.
What is Potassium?
This permanent medical device is frequently implanted to maintain a safe heart rate in patients suffering from symptomatic, high-degree heart blocks.
What is permanent pacemaker?
These terminal fibers web throughout the ventricular myocardium to trigger rapid, synchronized ventricular contraction.
What are Purkinje fibers?
This nerve is stimulated during a carotid sinus massage or bearing down, causing a rapid release of acetylcholine that slows down sinus tachycardia.
What is the vagus nerve?
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What is Accelerated Junctional?
This medical emergency occurs when an ECG shows an organized rhythm, but the patient has no palpable pulse.
What is Pulseless Electrical Activity (PEA)?
This lethal block occurs when the atria and ventricles beat independently of each other, resulting in a total dissociation between P waves and QRS complexes.
What is Third-Degree (Complete) AV block?