What Causes Chest Tightness And Pain, Breathing Difficulty, Occasional Headaches With Episodes Of Tongue And Finger Numbness?

Hello Doctor, My question is based on some symptoms my dad has been feeling lately. Some of these include chest tightness and pain, difficulty breathing, occasional headaches and lately he s been having episodes of tongue and finger numbness. He already scheduled a doctor s appointment this week but since he s been having these sudden symptoms I m trying to do some research on what he might have while he waits for his appointment. Thank you beforehand!