My husband has been experiencing a sudden onset of his heart racing without activity, headache in the front of his head, tingling in his hands and feet, dizziness, feeling faint and weak. These episodes last about 5 to 10 mintues, and we are wondering if this is something to really worry about ? He has diabetes, high blood pressure, Marfan s syndrome, and is also suffering from depression, and anxiety due to being Bipolar rapid cycle.