If you have intermittent stabbing heart pain, first, try to stay calm and rest immediately. Sit or lie down in a comfortable position. Loosen any tight clothing. If possible, take slow, deep breaths to help relax. Avoid any strenuous activity. If you have any prescribed medications for heart conditions, take them as directed. However, if the pain persists, worsens, is accompanied by shortness of breath, dizziness, or other concerning symptoms, call for emergency medical assistance right away. ????