6. Extreme Fatigue

Unexplained and overwhelming fatigue can be an early sign of cardiac problems, including cardiac arrest. The heart struggles to pump blood efficiently, causing the body to feel drained of energy. This fatigue can come on suddenly and be a sign of impending cardiac arrest.

7. Shortness of Breath

Difficulty breathing or shortness of breath, particularly during rest, can be a sign that the heart is not pumping enough blood to meet the body’s oxygen demands. This is especially true if the shortness of breath occurs suddenly and without exertion, as it may signal the onset of cardiac arrest.

8. Palpitations

Heart palpitations, which feel like a fluttering or pounding sensation in the chest, can indicate an irregular heartbeat or arrhythmia. In some cases, these palpitations may precede cardiac arrest, especially if they are accompanied by other symptoms such as dizziness or shortness of breath.

9. Sweating (Diaphoresis)

Sudden, cold sweating, often unrelated to physical exertion, can be a sign of cardiac distress. This excessive sweating can occur just before cardiac arrest and is often associated with chest pain or discomfort. It is a response to the body’s stress as the heart struggles to pump blood.

10. Nausea or Vomiting

Some people may experience nausea or even vomiting before cardiac arrest, especially if they are having a heart attack that leads to cardiac arrest. This symptom is often overlooked or mistaken for a less serious issue, such as indigestion, but can be a warning sign of a serious heart problem.