Coronary heart disease is the “first killer of mankind”, is currently a serious danger to human health one of the diseases. Statistics show that the number of people who die of various kinds of coronary heart disease in China every year is more than 1 million, of which the sudden death in the sleep of 30%. Research shows that sleep and cardiovascular disease mortality rate has a close relationship. Poor sleep can increase the risk of coronary heart disease. In order to raise public awareness of healthy sleep and heart protection, the theme of World Sleep Day in China on March 21, 2013 is: “Pay attention to sleep, care for the heart”. In daily life, some people snore very seriously, not only snore loudly, and always hit the hit on not gasping, after a dozen seconds to dozens of seconds to appear a very loud sound and then snore again, hit a few snores and again appeared to hold their breath, family members are always worried that he appeared to be in danger, to see that he held his breath too heavy to push him to wake up. The patient is also drowsy during the day and always wants to sleep. This disease is medically known as sleep apnea syndrome. What are the clinical manifestations of sleep apnea hypoventilation syndrome: daytime drowsiness, lethargy, fatigue, inability to relieve fatigue after sleep, and frequent napping. Morning headache or dizziness, and dry mouth and bitter mouth. Poor mental concentration during the day, memory loss, and short temper. Increased nocturia, acid reflux and heartburn. Sexual dysfunction and other symptoms. Of course, not every patient has the above clinical characteristics, especially in the case of milder patients are often unaware of the patient’s wife, children, friends often have the most opportunity to observe the patient’s apnea episodes, and their observations and descriptions often provide valuable diagnostic clues. Apnea and angina, myocardial infarction angina, myocardial infarction is due to acute ischemia and hypoxia of the myocardium, sleep apnea caused by nocturnal hypoxemia, increased blood pressure, heart rate, hemodynamic changes can lead to cardiac ischemia, hypoxia, sleep apnea can exacerbate or induce angina or myocardial infarction is not difficult to understand. Acute myocardial infarction is the result of prolonged ischemia and hypoxia of the heart, and sleep apnea syndrome is also closely related. For sleep apnea related cardiac ischemia and hypoxia, simple oxygen and night taking vasodilator drugs often can not achieve the therapeutic purpose, through the nasal airway positive pressure ventilation to remove sleep apnea is the most ideal means of treatment. 1995 in the world’s very famous “The Lancet” medical journal, the Swedish researchers reported ten cases of angina at night diagnosis of sleep apnea syndrome patients, after the treatment of After treatment to remove sleep apnea, angina disappeared, and ambulatory electrocardiograms showed a significant reduction in the number of episodes of cardiac ischemia. Studies of apnea and arrhythmia have concluded that elevated vagal tone and hypoxemia caused by sleep apnea are the primary mechanisms that lead to cardiac arrest. This cardiac arrest is in a sense a protective mechanism for the heart, which can reduce the work done by the heart by slowing down the heartbeat in order to reduce the oxygen consumption of the heart and avoid further damage to the heart. This protective mechanism is extremely important especially in cases where sleep apnea causes severe oxygen deprivation. It is worth noting that if a pacemaker is simply installed without simultaneous treatment of sleep apnea, although cardiac arrest can be eliminated, this protective mechanism is also canceled, and instead the heart becomes more severely hypoxic. Thus, for patients with recurrent cardiac arrest at night, before installing a pacemaker to treat it, it is important to think that it could be caused by sleep apnea, and sleep apnea monitoring should be performed. Is holding one’s breath at night a heart attack? Breathlessness and panic attacks that occur suddenly during nighttime sleep and are relieved by waking up and resting in a seated position for a few moments are medically known as “nocturnal sleep apnea” and “sedentary respiration,” and are typical signs of cardiac insufficiency. Nocturnal arrhythmias can also be characterized by panic attacks, chest tightness, and a strong sense of fear. These symptoms are very similar to those of nocturnal sleep apnea, and because some medical personnel do not know much about sleep apnea, it is very easy to misdiagnose sleep apnea syndrome as heart disease. It has been reported many times that many patients with severe sleep apnea who have been misdiagnosed as heart disease for a long time have achieved good treatment results after polysomnography sleep apnea monitoring, which confirms the diagnosis of sleep apnea syndrome. If you have the above symptoms, along with uneven snoring, you should also think about the possibility of sleep apnea and go to the relevant sleep apnea treatment center.