satiety test

The full-meal test is carried out by the following principles. After eating a meal, the gastrointestinal motility and digestive gland secretion are enhanced. In order to meet the energy needs, the cardiac output is increased, the myocardial oxygen consumption is also increased, and the body's self-regulating mechanism increases the blood flow of the digestive organs. The blood flow of the coronary arteries and other organs is correspondingly reduced. When the coronary arteries are normal, the blood flow can meet the myocardial needs after the meal. For example, the coronary artery stenosis is in a critical state, and the blood flow after the meal is reduced, which can not meet the needs of the myocardium, and angina or electrocardiographic ischemic changes can occur. Basic Information Specialist classification: cardiovascular examination classification: electrocardiogram Applicable gender: whether men and women apply fasting: fasting Tips: Avoid eating fried, greasy food. Normal value When the coronary arteries are normal, the blood flow can meet the myocardial needs after the meal. For example, coronary artery stenosis is in a critical state, and post-prandial blood flow reduction may cause angina or electrocardiographic ischemic changes. Clinical significance Positive test support for the diagnosis of coronary heart disease, negative can not completely rule out coronary heart disease. The positive rate of this test is low (24%-39%) and there are some false positives, so it can only be used as a screening test for coronary heart disease, and it cannot be diagnosed or excluded from coronary heart disease. Abnormal results According to their clinical symptoms, coronary heart disease can be divided into 5 types, the following describes the common symptoms of different types of coronary heart disease: 1. The angina pectoris manifests as a crushing feeling behind the sternum, a feeling of bloating, accompanied by obvious anxiety, lasting for 3 to 5 minutes, often spreading to the left arm, shoulder, lower jaw, throat, back, or radiating to the right. Arm. Sometimes it can affect these parts of coronary atherosclerotic heart disease without affecting the posterior sternal area. Force, emotional, cold, full meal, etc. increase myocardial oxygen consumption, called labor angina, rest and inclusion Nitroglycerin is relieved. Sometimes angina is not typical, it can be expressed as tightness, syncope, weakness, belching, especially in the elderly. 2, myocardial infarction type infarction often occurs a week or so before prodromal symptoms, such as resting and mild physical activity when the onset of angina, accompanied by obvious discomfort and fatigue. Infarction manifests as persistent intense pressure, suffocation, and even knife-like pain. It is located behind the sternum and often spreads throughout the chest, with the left side as the weight. The pain site is consistent with the previous angina pectoris, but lasts longer, the pain is heavier, and rest and nitroglycerin do not relieve. Sometimes it manifests as pain in the upper abdomen and is easily confused with abdominal diseases. With low fever, irritability, sweating and cold sweat, nausea, vomiting, palpitations, dizziness, extreme fatigue, difficulty breathing, sudden death, lasting more than 30 minutes, often for several hours. If you find this condition, you should see a doctor immediately. 3. Asymptomatic Myocardial Ischemia Many patients have extensive coronary occlusion without feeling angina. Some patients do not feel angina during myocardial infarction. Some patients have sudden cardiac death, and some patients have arrhythmia due to electrocardiogram, or have undergone coronary angiography because of a positive exercise test. 4, heart failure and arrhythmia type of patients with angina pectoris, after the extensive lesions, extensive myocardial fibrosis, angina gradually reduced to disappear, but the appearance of heart failure, such as tightness, edema, fatigue, etc., and each Arrhythmia, manifested as palpitations. Some patients have never had angina, but directly manifested as heart failure and arrhythmia. 5, sudden death refers to the unpredictable sudden death caused by coronary heart disease, caused by cardiac arrest within 6 hours after the onset of acute symptoms. Mainly due to ischemia caused myocardial cell electrophysiological activity abnormalities, resulting in severe arrhythmia. The people who need to be examined: 1. The author has angina after the meal. 2. Suspected coronary heart disease, and weak or physical dysfunction, it is not suitable for exercise test. Precautions The variety and quantity of the test meal are not limited, but the total calories should meet the requirements. Forbidden before examination: pay attention to normal diet, pay attention to normal work and rest, and prevent endocrine disorders. Requirements for inspection: Actively cooperate with the doctor's request. Inspection process method: 1. Before the test, the nitrate-expanding agent such as nitrate ester and calcium ion antagonist was stopped. 2. Fasting after dinner on the 1st day before the test. 3. On the morning of the test, the conventional 12-lead ECG was recorded on the fasting surface. 4. Let the subjects eat, the amount of food as usual, plus lard 60g, 2 eggs, the total heat should reach 4185.5J-6278.3J. 5. 12-lead ECG was recorded once every 30, 60, and 120 minutes after meal, and compared with fasting electrocardiogram. The result is judged: 1. Positive for one of the following conditions: (1) Typical angina occurs after a meal. (2) Post-prandial electrocardiogram ST segment ischemic reduction >0.5mm. (3) The T wave changes from upright to inverted. 2. One of the following conditions is suspected positive: (1) Atypical angina occurs after a meal. (2) The ST segment of the electrocardiogram after the meal is reduced by nearly 0.5 mm. (3) The T wave changes from erect to flat. 3. There was no angina pectoris after the meal, and no ECG ST-T changed to negative. Not suitable for the crowd Inappropriate crowd: temporarily unknown. Adverse reactions and risks There are no related complications and hazards.