AFib occurs when AFib-related blood clots break free from the heart and travel through the circulatory system. These clots most commonly lodge in brain arteries, causing ischemic strokes that are twice as likely to result in death or permanent disability compared to strokes from other causes.

Beyond stroke risk, emerging evidence published in Research and Practice in Thrombosis and Haemostasis (RPTH) shows AFib patients also face increased risks of pulmonary embolism and other thromboembolic events. The clots can travel to arteries in the legs, arms and other vital organs, creating multiple pathways for serious complications.

Many people with AFib blood clots experience no symptoms, making early detection crucial for preventing catastrophic outcomes. While some patients notice heart palpitations, irregular pulse or chest discomfort, studies show that asymptomatic AFib cases often go undiagnosed until a stroke or other major event occurs.

The ISTH Scientific and Standardization Committee (SSC) emphasizes that healthcare providers must maintain high clinical suspicion for AFib in at-risk populations, particularly older adults with cardiovascular disease, hypertension or diabetes. Regular pulse checks and electrocardiogram screenings can identify irregular heart rhythms before dangerous clots form.

This silent nature of AFib makes understanding your personal risk factors and seeking appropriate medical evaluation essential for preventing life-threatening complications from atrial fibrillation blood clots.

Recognizing AFib symptoms early can prevent dangerous blood clots and stroke. While many people ignore their heartbeat, millions worldwide live with AFib, a heart rhythm disorder where electrical signals become rapid, irregular and disorganized. This irregular heartbeat detection is crucial because AFib often occurs without obvious warning signs.

Simple pulse check for AFib detection

If you suspect AFib symptoms, a basic pulse check can reveal irregular heart rhythms. Place your index and middle fingers on the inside of your left wrist and feel for your pulse. Focus on the rhythm and pattern rather than counting beats. An irregular, chaotic pulse pattern may indicate AFib and requires immediate medical evaluation.

AFib diagnosis process and medical testing

When you experience irregular heartbeat symptoms, your doctor will conduct a comprehensive AFib diagnosis evaluation. This systematic approach includes:

Medical history assessment:

• Duration and nature of your symptoms
• Existing medical conditions
• Alcohol consumption patterns
• Family history of AFib or heart disease
• Thyroid condition history

Physical examination and testing: Your healthcare provider will listen to your heart with a stethoscope and check your pulse manually. If AFib symptoms are suspected, additional AFib testing typically includes:

• Electrocardiogram (ECG) – The gold standard for diagnosing irregular heart rhythms
• Blood tests – To identify underlying conditions contributing to AFib
• Extended monitoring – For patients with intermittent symptoms