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Determining the Regularity of an ECG/EKG Rhythm    • Determining the Regularity of an ECG/...  
Determining the heart rate in an EKG rhythm tracing using 3 methods    • Determining the heart rate in an EKG ...   Identifying and describing P waves in an EKG rhythm    • Identifying and describing P waves in...  
Identifying and Measuring the PR Interval in an EKG Rhythm Strip    • Identifying and Measuring the PR Inte...   Describing and measuring the QRS complex in an EKG rhythm strip    • Describing and measuring the QRS comp...  
How to analyze an EKG rhythm strip in 6 steps    • How to analyze an EKG rhythm strip in...  


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Ventricular Tachycardia
The first potentially lethal rhythm we're going to discuss is ventricular tachycardia. This is a fast, abnormal rhythm that originates in the ventricles, the lower chambers of the heart. Ventricular tachycardia can cause the heart to beat so rapidly that it can't pump blood effectively. This can lead to fainting, chest pain, and even sudden cardiac arrest. On an EKG, ventricular tachycardia looks like a series of wide QRS complexes with no discernible P waves. If you see this pattern, immediate intervention is warranted.

Ventricular Fibrillation
The second potentially lethal rhythm is ventricular fibrillation. This is a chaotic, disorganized rhythm that occurs when the ventricles quiver instead of contracting normally. Ventricular fibrillation can cause the heart to stop pumping blood altogether, leading to sudden cardiac arrest. On an EKG, ventricular fibrillation looks like a chaotic, irregular pattern with no discernible P waves or QRS complexes. If you see this pattern, it's a rhythm you should call a code or 911.

Torsades de Pointes
The third potentially lethal rhythm is Torsades de Pointes. This is a specific type of ventricular tachycardia that is characterized by a twisting of the QRS complex around the baseline. Torsades de Pointes can cause fainting, chest pain, and sudden cardiac arrest. It can be caused by certain medications or electrolyte imbalances, such as low levels of potassium or magnesium. On an EKG, Torsades de Pointes looks like a series of QRS complexes that twist around the baseline. If you see this pattern, it requires immediate intervention.

Asystole
The fourth potentially lethal rhythm is asystole, which is a complete absence of electrical activity in the heart. It is often seen in people with advanced heart disease or those who have suffered a myocardial infarction. Symptoms may include sudden collapse and loss of consciousness. Immediate treatment is required with cardiopulmonary resuscitation or CPR, along with the administration of epinephrine and other medications. Defibrillation may not be effective for this rhythm.

Third degree heart block
And the fifth potentially lethal rhythm is thirddegree heart block, also known as complete heart block, is a type of cardiac conduction disorder in which there is no transmission of electrical impulses from the atria to the ventricles, causing them to beat independently of each other. The atria and ventricles are paced by separate electrical systems. This rhythm requires immediate intervention with a temporary transcutaneous or transvenous pacing and medications. This would be followed by a permanent pacemaker placement.

So, those are the five potentially lethal rhythms of EKG: ventricular tachycardia, ventricular fibrillation, Torsades de Pointes, Asystole, and Third Degree Heart Block. While these rhythms can be scary, it's important to remember that prompt intervention can save lives. Thanks for watching, and we'll see you in the next video.