Doctor insights on:
How Do Class 1b Antiarrhythmic Drugs Help In Treating Ventricular Fibrillation
Channel Poisons.: All antiarrhythmic medications are targeted at the channels that allow sodium, potassium, and calcium into and out of cardiac muscles, myocytes. They target certain channels at a cellular level to slow or break the abnormal rhythm. They often do nothing to fix or correct the problem. ...Read more
When should u worry about escape rhytms and ventricular fibrillation due to overactive parasympathic nervous system? And heartblock?
Complicated question: Hard to answer without more info and more space. Escape rhythms are like a "back-up" rhythm, and are generally protective rather than concerning. Lower grade heart block also is usually not symptomatic, and it doesn't sound like you're dealing with anything that might progress to 3rd degree AV block. As for VFib, an overactive parasympathetic system shouldn't really put you at risk for that. ...Read more
Yes: Usually propel who have CHF have a poor lv function; less than 35%. With this diagnosis your heart has the propensity to go into very dangerous rhythms: ventricular tachycardia and ventricular fibrillation. With these arrhythmias you are rendered dead, without a blood pressure, etc. Hence, why you are recommended to get an implantable cardioverter defibrillator when you have a cardiomyopathy. ...Read more
It depends: Ventricular fibrillation is from the bottom chamber; vf is worse; it usually causes cardiac arrest which is often fatal. Atrial fibrillation - from the top chamber- while not as severe, also has significant health risks. It increases the risk of stroke, which can be disabling or fatal. ...Read more
What makes atrial fibrillation not immediately life threatening while ventricular fibrillation is?
A circuit breaker: The rhythms in the top chamber during atrial fibrillation can reach and exceed 600 bpm. If this were conducted directly to the lower chamber, it would be as fatal as ventricular fibrillation. However, nature built in a circuit breaker called the av node between the two such that only some of the top chamber heartbeats in fibrillation make it to the bottom chamber. ...Read moreSee 1 more doctor answer
Ventricular or Atria: Fibrillation is a random chaiotic electrical pattern. Atrial fibrillation is common an some older adults live in continuous a-fib and feel ok while on medications that slow the ventricular response to the atrial rate. Ventricular fibrillation is not tolerated, meaning someone having true ventricular fibrillation will loose consciousness in seconds. True vf is life threatening in seconds. ...Read more