Hand and foot numbness chest tightness palpitations dizziness and nausea may be caused by coronary heart disease, cardiomyopathy and other organic heart disease, but also may be a heart attack and other heart disease and cerebral blood supply insufficiency or a combination of diseases. 1. Organic heart disease: If you suffer from organic heart disease such as coronary heart disease, cardiomyopathy, myocardial infarction and other organic heart disease, it may cause chest tightness and palpitations and other symptoms. And due to the existence of heart lesions, the blood supply ability of the heart decreases, which may lead to insufficient blood supply to the brain, thus triggering dizziness and nausea, numbness of the hands and feet and other symptoms. 2. Heart disease and insufficient blood supply to the brain: If there are both heart diseases such as coronary heart disease and diseases that can lead to insufficient blood supply to the brain such as stenosis of blood vessels in the skull and brain, it may also cause a series of symptoms such as numbness in the hands and feet, dizziness and nausea, and tightness in the chest and palpitations, etc. The above symptoms are more complicated. 3. Due to the complexity of the above symptoms, it may be caused by one disease, but it may also be caused by a variety of diseases, such as heart disease combined with cervical spondylosis and so on. Therefore, if you have numbness of the hands and feet, chest tightness, palpitations, dizziness and nausea, you must go to the hospital to complete the relevant examinations and find out the cause and then cooperate with the doctor for symptomatic treatment.