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> > "Sometimes when he laughs very hard, coughs or sees several images > simultaneously, he feels a surge of pressure in his head, then it feels like > he's going to pass out, but so far that hasn't happened." > Dear Nicky, this symptom should be brought to your father's doctor's attention. Sometimes when one coughs or laughs, vagus nerve stimulation is sufficient to significantly slow down the heart thereby causing a temporary sensation of lightheadedness. However, because of your father's history of hypertension, your father's doctor needs to know that he is experiencing these episodes. ---- Peace Mary Ann