Can sudden fear or extreme emotional stress affect the heart? Doctors explain that intense fear triggers a surge of stress hormones such as adrenaline, which can raise heart rate and blood pressure. In most healthy people the body copes, but in rare cases, particularly where there is an undiagnosed heart rhythm problem or other heart condition, a sudden shock can trigger a dangerous heart rhythm and cardiac arrest. Children can also be affected, though this is uncommon. Warning signs such as fainting, chest pain, palpitations or unexplained breathlessness should never be ignored. If someone collapses and is unresponsive, call for emergency help immediately and start CPR if trained. Regular check-ups can help detect hidden heart problems early.
