Hello
As you stated that after supper ,he laid on a couch for a few hours ( and 2nd time also same thing ).
This is not a case of post prandial
hypoglycemia ( low level of sugar )because it occurs within 1/2 hours , while your huband laid on couch for few hours .
While sweating and
cold clammy skin are common after faintness (
dizziness ).
May be due to these possibilities ,these include:
1
Orthostatic hypotension ( when you measured his BP , it was also 80/50 mm of Hg.)
Sudden rising from a recumbent position or standing quietly ( as in your husband case ) are precipitating circumstances.
Causes are 30 % in elderly ( but you didn't mention the age of your husband ), physical deconditioning may play an important role .
Also occurs with autonomic
nervous system disorders, either peripheral (
diabetes , nutritional or amyloid polyneuropathyor other disorder.
2 The nest reason of such cases may be due to hyper tension ( in your husband it was 80/50 but this was after faintness and this is common) .
I recommend you please consult a physician and get his opinion when the condition of your husband is normal i.e. not at or after faintness .
Hope this will help you.
Good luck.