Ideally, many people barely notice their hearts beating, which is natural. However, any noticeable change in the heartbeat should be concerning, be it slow or fast. Chances are, you're experiencing what's usually known as "heart palpitations," a term for feeling your heart is beating hard, fast or erratically. Although heart palpitations can be worrisome, they are usually harmless. In rare cases, they can be a symptom of a more serious heart condition, such as an irregular heartbeat … [Read more...] about Heart Palpitations: When To Visit The ER