Hi,
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As your chest pain and heaviness is related to exertion (walking) a possibility that it is of cardiac origin cannot be neglected. A very important feature of stable angina is angina on exertion. The stabbing pain and dull nature, which can better be termed as chest heaviness that starts on exertion like walking or climbing upstairs and goes away on taking rest. Your blood pressure is mostly in prehypertensive state, but your maximum systolic (upper) BP is grade 1 systolic hypertension. Your body mass index is high. Also, you were a smoker till the age of 38. Smoking is a sole risk factor for all sorts of cardiac ailments and especially coronary artery disease. As you have never checked your lipid profile, we cannot comment on your cholesterol and triglyceride level. Your age is in the late 60s and the natural presentation of coronary artery disease starts after the age of 55 in males. In short, your case can be summed up as risk based on the facts of increased BMI, ex-smoker, non-vegetarian and mild hypertension. I would consider it as angina on exertion and associated with on and off dyspnea (breathing problem) on exertion. As you have not mentioned any history of gastritis, heartburn, peptic ulcer, anxiety, lack of sleep, disturbed sleep cycle and muscular sprain (as all of them can mimic the cardiac pain), my suggestion is to get an ECG, 2D echo, and treadmill test done. 2D echocardiogram will tell about any motion abnormality of the walls of the heart. If any part of the heart receives less blood supply, then it will get injured and there will be some motion abnormality in that part. During the treadmill test, continuous ECG will be taken as the patient walks on a treadmill. As your symptoms are present mostly during walking, any ischemia to heart muscles during this test will be reflected in the ECG. Echo and TMT are more than 80% sensitive for any cardiac disease. Also, get a complete lipid profile to know the status of your cholesterol and triglycerides. Stop taking the yolk (yellow part) of eggs in your diet and red meat till these tests are done. Do strenuous exercise for 45 minutes a day for at least 6 days a week. Try to replace beer with red wine, which is cardioprotective in nature. Use three different types of oil in your food, alternatively every month. As of now, till your tests are done, I would suggest you to keep a tablet Sorbitrate 5 mg (Isosorbite dinitrate) with you and take it sublingually the next time when the pain starts. If pain settles down in 10 minutes it is very likely to be of cardiac origin. Consult your specialist doctor and take the above medicine. Once it gets confirmed as cardiac origin, then discuss with your doctor and take the medicines mentioned below with consent. Take Tablet Ecosprin 75 mg (Aspirin) once at night, Tablet Atorvastatin 5 mg once at night, Tablet Metolar-XR 12.5 mg (Metoprolol) twice daily. Your target BP should be less than 130/80 mmHg. Take Tablet Esomeprazole 40 mg before breakfast in the morning if there is gastritis or heartburn problem.