Low blood pressure and heart pumping strength

  I know MG effects VOLUNTARY muscles but wonder if there is also some impact on heart or vascular system. I have been diagnosed with occular MG with poss. mild general effects. Sleep cures most of my problems! I have had a stretch of lack of sufficient sleep and one reaction has been low blood pressure. I am 55 and normally run about average BP with occassional borderline hypertention with higher salt intake. Lately I have had episodes of BP's such as 97/48 which make me feel very restless and wiped out.  Sleep improves BP which makes me wonder about effects or heart pumping action or peripheral circulation. Any relation? I also have occasional hypogylcemic episodes.
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Since this is such a rarely described complication I have attached  the
reference I referred to into my answer
Hofstad H.  Ohm OJ.  Mork SJ.  Aarli JA.
Heart disease in myasthenia gravis.
Acta Neurologica Scandinavica.  70(3):176-84, 1984 Sep.