Futurity -- U. WARWICK (UK) — Not getting enough sleep or having sleep interrupted can have serious, long-term effects on overall health, leading to stroke, heart attack, and cardiovascular disorders. “If you sleep less than six hours per night and have disturbed sleep you stand a 48 percent greater chance of developing or dying from heart disease and a 15 percent greater chance of developing or dying of a stroke,” says Francesco Cappuccio, professor at the University of Warwick.