Severe Muscle Cramps In Arms And Legs During Cardioversion For AFib. Is It Possible During Sedation?
Thank you posting for your query.
Cramping of muscles can be sometimes seen during electrical cardioversion of cardiac arrhythmias. This may be precipitated by the electrical energy that is applied between the paddles placed on your chest. The electrical energy can affect the electrical depolarization/repolarization of the skeletal muscles also and produce a cramping effect along with a jerking/tonic movement of the limbs.
Factors that predispose to this include electrolyte imbalances, dehydration, extremes of age, other diseases of muscle, or diseases of neuromuscular junction, stress, anxiety, hyperventilation, acid-base imbalance, etc.
Avoidance and treatment of the predisposing conditions along with a deeper level of sedation/anesthesia (rarely, even full general anesthesia) can help to prevent this.
I hope this answers your query. Feel free to contact me for any further clarifications.
With regards,
Dr RS Varma
Thank you for the reply.
The benefits of a sinus rhythm far outweigh the risks of an attempt at cardioversion. This is especially so, if there are no blood clots in the left atrium, there is no structural heart disease and the left atrial size is not increased.
The risks of full general anesthesia are the same as for any other procedure. Since the duration of anesthesia is likely to be very short, the risks are likely to be less. The usual precautions and evaluation should be done, especially assessing your lung function, electrolyte balance, hydration, assessing for any allergies, etc. With current techniques of anesthesia, the risks are quite less but as can be expected, nobody can guarantee a 100% success or a totally risk-free procedure.
Before cardioversion, it is essential to take medicines to prevent blood from clotting (usually for a minimum period of 3 weeks), unless a trans-esophageal echo has found no evidence of blood clots in the left atrium. This is to prevent these blood clots from getting "embolized" from the heart to other critical areas like the brain, limbs, kidneys etc and causing obstruction to blood flow, after the atria start contracting properly during sinus rhythm.
There may be a need to take some drugs for control of the rhythm and heart rate also. I am sure your cardiologist would adjust the necessary medicines and their dosages for you.
I hope these details will prove to be useful for you. I wish you all the best for a healthy and happy life. Please accept this answer if you do not have any other queries.
With regards,
DR RS Varma