That EKG sounds mostly normal. There are many causes of chest pain, and the heart is just one. A stress test and ultrasound of the heart are usually are good evaluations of the heart causes. An internist or gastro-enterologist can evaluate other possible causes.
If your EKG showed a normal rhythm when you had symptoms and a fast pulse rate, then this is usually in response to something else. A cardiologist or heart rhythm specialist should confirm that the rhythm was normal. Your gastro-intestinal symptoms are more the field of gastro-enterologist.
Blood from the nose from a heart attack is somewhat unusual but can be seen in severe cases. Patients who suffer deadly heart rhythms can also fall and injure themselves.
It sound like your step father has significant blockages in the blood vessels supplying his heart both the natural vessels and the bypass grafts. It also sounds like he has artery blockages in the leg and neck. The doctors may be concerned about the risk of further procedures. Having many significant blockages and a reduced pumping function of the heart is a serious condition, but people can sometimes do well with medications and diet. The doctors taking care of him or the hospital may have services to discuss his status with you if he gives permission.
There are many possible explanations. I would suggest getting an evaluation by a physician.
Those heart rates are within a normal range. Heart rates can vary quite a bit. If you have gained weight, then this may be one of the causes. Regular exercise will slow your heart rate over time. Thyroid problems are also associated with weight gain and changes in heart rates.
I am sorry to hear about your brother. I am not sure I understand the question, but a pacemaker is used for slow heart rates and occasionally to improve heart failure symptoms. Infection is one of the most common complications. The arm swelling could be from a clot that formed when the wires were placed in the vein for the pacemaker. Blood thinners are usually used to treat this.
Patients having setbacks after major surgery is not that uncommon. I would suggest that you be around when the doctors round to get an update. The nurses and hospital chaplains are also very helpful in communicating and explaining what is going on. Talk with them. I wish you the best.
Angina is usually associated with artery blockages but can be seen without major blockages. She should be evaluated for blockages. Regarding valves, angina is usually only associated with a very tight valve and not leaky valves as often. Cardiologist usually evaluate the valves by physical exam and ultrasound.
There is some suggestion that ginseng may interfere with Warfarin. It is recommended not to take both. A neurologist has other medications that may help, that can be used with Warfarin.