Hello and thank you for using HCM. I carefully read your question and I understand your concern. I will explain you something and give you my opinion. Nausea might have different causes. It can originate from gastrointestinal problems or other than this. Sometimes a hypertensive crises can be manifested with headache, chest discomfort, blured vision, nausea or vomiting. So, if we are dealing with a hypertensive person, its important to measure the blood pressure during this symptoms. As you explain, the symptoms gets worse after eating. So, my opinion is that it must be related whit a gastrointestinal problem. Ischemic heart disease that can lead to heart attach in general has different symptoms.Usually heart problems are manifested with chest pains. They are retro-Stern, squeezing or like tightness that last for 5-20 minutes. If a person is having a heart attach, he might experience hard pains, nausea or vomiting. But this is a dramatic situation and it does not last for several days. So, if he just complains of nausea strongly related to eating, it must be a gasrto-intestinal problem (esophagus, stomach, gallbladder, pancreas). Even thou , as he is a hypertensive person and he has hereditary for heart disease it mandatory to make a heart check up. I will recommend an abdominal echo, an electrocardiogram, a cardiac echo, a fool blood analyze, stress test and maybe a fibroid-gastro-schopy if its possible. All this will better clear the situation. So, I have to tell you that you should not worry, but just try to convince your husband to make this simple examinations. Hope I was helpful. Best regards