About Sudden Cardiac (Heart) Arrest
Sudden cardiac Aarest (SCA) can be caused by various pathophysiologic factors, including:
- Electrical malfunction: An abnormal heart rhythm, known as an arrhythmia, can disrupt the electrical signals that control the heart's pumping action, leading to SCA.
- Structural issues: Certain structural abnormalities of the heart, such as congenital heart disease, cardiomyopathies, and problems with the heart's electrical system, can increase the risk of SCA.
- Trauma: A sudden injury to the chest, particularly a hard blow to the left side, can trigger SCA.
The non-modifiable risk factors for SCA are factors that cannot be changed. These include:
- Age: The risk of SCA increases with age, especially in individuals over 45 years old.
- Family history: Having a family history of SCA or certain inherited heart conditions can raise the risk.
Modifiable risk factors for SCA are factors that can be influenced or changed. These include:
- Coronary artery disease: The most common underlying cause of SCA is coronary artery disease, which is often associated with lifestyle factors such as smoking, high blood pressure, high cholesterol levels, obesity, and a sedentary lifestyle.
- Substance abuse: Illicit drug use, particularly cocaine and amphetamines, can increase the risk of SCA.
- Medications: Certain medications, including some antibiotics and certain heart medications, can worsen heart arrhythmias and increase the risk of SCA.
Remember to consult with your healthcare professional for personalized advice on managing your risk factors and to discuss any concerns you may have.
The most common early symptoms of sudden cardiac arrest (SCA) include:
- Chest pain or chest pressure that worsens with exertion and improves with rest
- Shortness of breath
- Heart palpitations
- Dizziness or fainting
- Difficulty breathing
- Nausea and vomiting
- Extreme fatigue
- Flu-like symptoms
As SCA progresses or reaches a higher severity, additional symptoms may occur, such as:
- Loss of consciousness or fainting
- No detectable heartbeat or pulse
- Racing heartbeat
- Dizziness
- Nausea with or without vomiting
It's important to note that symptoms can vary depending on sex. Women are more likely to experience shortness of breath, while men may report chest pain more frequently. Identifying and acting upon these early signs can be life-saving. If you experience any new or concerning symptoms, like chest pain, shortness of breath, or fainting, it is important to seek immediate medical attention.
Examinations, tests, and procedures commonly performed to diagnose sudden cardiac arrest (SCA) include:
- Electrocardiogram (ECG or EKG): This test records the electrical activity of the heart and can diagnose many syndromes that can cause sudden death.
- Echocardiogram: An ultrasound scan of the heart that allows doctors to visualize the heart beating in real time and detect any physical abnormalities.
- Blood tests: These tests, such as a complete blood count (CBC), provide information about blood content and can help identify reversible causes of cardiac arrest.
Additional examinations, tests, and procedures to determine the stage or severity of sudden cardiac arrest may include:
- Cardiac event monitoring: This test involves wearing a portable device that records the heart's electrical activity over an extended period, typically 24 to 48 hours or longer.
- Stress testing: This test evaluates how the heart performs during physical activity, helping assess its function and identifying any abnormalities.
- Imaging tests: These tests, such as cardiac catheterization or other imaging techniques, provide detailed images of the heart's structure and function.
- Genetic testing: These tests may also be considered for individuals with a family history suggesting SCA as a possibility. Genetic testing can help identify genetic changes that increase the risk of cardiac arrest.
Remember, specific examinations, tests, and procedures should be determined by your healthcare professional based on your individual situation.
The goals of treatment for sudden cardiac arrest (SCA) include:
- Restarting the heart: The main treatment for SCA is to restore normal heart rhythm. This is typically done through cardiopulmonary resuscitation (CPR) and the use of a defibrillator. CPR helps circulate blood and oxygen to vital organs, while a defibrillator delivers an electric shock to the heart to restore its normal rhythm.
- Addressing the underlying cause: In addition to restarting the heart, it is important to identify and treat the underlying cause of SCA. For example, if SCA is caused by an infection like sepsis, intravenous antibiotics may be necessary.
- Supportive care and observation: Patients with SCA may require supportive care and observation. This includes providing oxygen, administering medications to stabilize blood pressure, and monitoring vital signs.
- Emergency medical services (EMS) interventions: EMS providers may use antiarrhythmic drugs for SCA that does not respond to defibrillation shocks. These medications help restore normal heart rhythm. However, their use and effectiveness may vary, and potential side effects should be considered.
- Extracorporeal support devices: In some cases, when organ toxicity is present or multi-organ failure occurs, the use of extracorporeal cardiac and respiratory assist devices may be necessary. These devices provide temporary support to the heart and lungs until organ function improves.
It is important to note that these treatments should be administered by healthcare professionals in a hospital or emergency setting. Health behavior changes, such as adopting a healthy lifestyle with regular exercise and a balanced diet, can also help reduce the risk of future cardiac events. However, it's essential to consult with a healthcare professional for personalized advice. Medication dosing may be affected by many factors, so check with your healthcare professional about dosing for your individual situation. Other side effects can occur. Check with your healthcare professional or read the information provided with your medication for additional side effect information.