What causes a pounding heart beat?

A pounding heartbeat, or palpitations, can result from various factors, including stress, anxiety, physical exertion, or consumption of stimulants like caffeine and nicotine. Medical conditions such as arrhythmias, hyperthyroidism, or anemia can also contribute to this sensation. Additionally, hormonal changes, dehydration, and certain medications may play a role. If palpitations are frequent or accompanied by other symptoms, it's advisable to consult a healthcare professional for evaluation.