What Causes Sudden Fainting Spell, Cramps In Calves And Temporary Memory Loss?
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Detailed Answer:
I read your question carefully and I understand your concern.
From what I understand your husband was alone and there were no other people present to describe what happened during the episode, how long it lasted etc?
If that is indeed the case then assessment is a little difficult. Given the high temperatures it might have been a syncope in the setting of dehydration and electrolyte disturbances which could explain the muscle cramps and aches.
On the other hand an epileptic seizure can not be excluded which also might leave some muscle pain. In the absence of any other symptom now I would consider the first possibility more likely.
By now it is difficult to evaluate that, blood tests should come out normal. If you see nothing unusual in him, I think it can wait till the scheduled appointment, where apart from the history and detailed exam, I suggest some routine blood tests and an EKG. If something suspicious comes out during examination further tests might be required.
I remain at your disposal for further questions.
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Detailed Answer:
Thank you for the feedback!
That description does make the possibility of a seizure more likely so CT imaging and EEG could also be considered.
In the meantime you should look for headache (especially if there's no history of headache in the past), vomiting, weakness or numbness of the limbs on one side, abnormal behavior, balance or coordination issues, double vision, signs which might indicate a brain lesion originating the seizure.
I hope to have been of help.