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During ventricular fibrillation (VF), an EKG shows a chaotic and irregular pattern of electrical activity with no identifiable QRS complexes, P waves, or T waves. The waveform appears as random, erratic squiggles, indicating that the heart's ventricles are quivering ineffectively instead of contracting properly. This lack of organized electrical activity results in the heart being unable to pump blood, leading to a critical medical emergency.
What else can I help you with?
What heart conditions is propafenone used for?
heart arrhythmias usually of the more dangerous kind. Like ventricular tachycardia and ventricular fibrillation.
Is atrial fibrillation worse that ventricular fibrillation?
No, ventricular fibrillation is worse than atrial fibrillation. This is because the ventricle is the chamber responsible for the main force pumping the blood out of the heart. If this contraction is not coordinated (like when fibrillation occurs), then the heart will not be able to function and consciousness will be lost within a few seconds. Ventricular fibrillation may result from electric shock, major myocardial infarct or some anaesthetic drugs. Resuscitation is usually possible by applying an electric shock (defibrillation) - which causes all cells to enter the refractory period and gives the sinoatrial node a chance to resume its normal pacemaker activity.
What is a couplet in cardiology?
A couplet in cardiology refers to two consecutive premature ventricular contractions (PVCs) on an electrocardiogram. It is considered a type of ventricular arrhythmia and may increase the risk of developing more serious arrhythmias like ventricular tachycardia or ventricular fibrillation. Treatment may be necessary depending on the patient's overall clinical situation.
Why is adrenaline used?
It can be used if you are going into anaphylaxis- a really bad allergic reaction. It is also used in heart-related emergencies, like with Ventricular tachycardia or fibrillation, or to try and restart the heart in asystole.
What is the recommended treatment for asystole, including the use of defibrillation?
The recommended treatment for asystole, which is the absence of a heartbeat, is CPR (cardiopulmonary resuscitation) and the administration of epinephrine. Defibrillation is not effective for treating asystole, as it is used for certain types of abnormal heart rhythms like ventricular fibrillation or pulseless ventricular tachycardia.
How can you differentiate between atrial fibrillation (AFib) and premature ventricular contractions (PVCs)?
Atrial fibrillation (AFib) is an irregular and rapid heartbeat originating in the upper chambers of the heart, while premature ventricular contractions (PVCs) are early extra heartbeats originating in the lower chambers. AFib may feel like a fluttering or racing heart, while PVCs may feel like a skipped or extra beat. A doctor can use an electrocardiogram (ECG) to diagnose and differentiate between the two conditions.
How does a defibrillator machine jump start the heart during a cardiac emergency?
A defibrillator machine delivers an electric shock to the heart, which helps restore its normal rhythm during a cardiac emergency. This shock can help jump-start the heart and potentially save a person's life by stopping dangerous heart rhythms like ventricular fibrillation.
What two heart rhythms are considered lethal?
There are a variety of them. There's ventricular fibrillation, ventricular tachycardia, and of course "asystole". There are also other lethal dysrhythmias that can deteriorate into forms of the aforementioned rhythms like 3 AV Block, agonal, Accelerated IVR, etc. http://skillstat.com/Flash/ECGSim531.html check out this website and look at some of the rhythms. click play when it comes up.
What are the differences between synchronous and asynchronous cardioversion?
Synchronus cardioversion is when shock is delivered on QRS portion of the heart cycle (time when ventricle depolarises). It is used when pulse is present in a patient usually greater than 150/min and sign and symptoms usually of tachycardia. Like in Atrial Fibrillation. But in case of asynchronus cardioversion shock can be given at any time of heart cycle. Pulse is absent like in Ventricular Fibrillation.
When the atria contract ahead of time is called?
When the atria contract ahead of time, it is referred to as atrial fibrillation. This is a type of irregular heart rhythm where the atria quiver or fibrillate instead of contracting properly. It can lead to symptoms like palpitations, shortness of breath, and an increased risk of blood clots.
What does it feel like to be floating?
There are several things these symptoms could represent, including atrial fibrillation or episodes of ventricular tachycardia. These could be symptoms of cardiac ischemia or an effect of a medication you are taking. I would recommend seeing your doctor for further evaluation.
What type of pattern will electro-cardiogram show for sudden cardiac arrest?
In sudden cardiac arrest elctro-cardiogram will show two types of patterns. One is straight line indicating that heart is stopped. Second is small vibration like pattern indicating ventricular fibrillation. You have to give intracardiac adrenaline in first and direct current shock in second.
