How long after the heart stops beating can fainting symptoms occur?
Apr 10, 2023
Source: Cainiu Health
Dr. Tian Hongbo
Introduction
Cardiac arrest can lead to syncope within 5 to 10 seconds. Symptoms such as fainting or dizziness occur when the heart stops beating for 5 to 10 seconds; seizures and loss of consciousness may develop after more than 15 seconds, and coma can occur after over 20 seconds. If the heart remains stopped for 5 minutes, severe brain damage will result, potentially leading to death at any moment.
The loss of consciousness usually occurs within 5 to 10 seconds after the heart stops beating.
Fainting or dizziness typically develops within 5 to 10 seconds after cardiac arrest; if it lasts longer than 15 seconds, seizures and unconsciousness may occur. If the heart stops for more than 20 seconds, coma can develop. After five minutes without a heartbeat, severe brain damage is likely, with a high risk of death. Therefore, when cardiac arrest occurs, it is essential to immediately call emergency services and seek urgent medical treatment. While waiting for help, chest compressions can be performed to help sustain vital functions. Cardiac arrest refers to the sudden cessation of the heart's pumping function, resulting in interrupted systemic circulation, altered consciousness, and respiratory arrest. It is commonly associated with underlying heart conditions or myocardial ischemia. Additionally, poisoning or drug allergies may also trigger symptoms such as chest tightness, shortness of breath, chest pain, and the disappearance of major arterial pulses.
In daily life, individuals with heart conditions should always carry their prescribed medications when going out.
