Are heat and stress hard on the heart?

Yes on the title of your question, increased temperature increases metabolism, increasing every functions of all ur organs, including the heart. chest pains, well thats the pain of being brokenhearted i guess..well seriously speaking, he needs to be looked at, anginal pain can actually be a precursor of myocardial infection. with anginal pain, it is the temporary decrease of blood supply in the muscle of the heart, it is relieved by rest, nitroglycerine, and oxygen, myocardial infarction or MI.. is more serious, someone can die from a mive MI which means, the tissues in ur heart dies due to complete blockage of coronary arteries...