Need to quickly identify atrial fibrillation on an EKG? Focus on the absence of discernible P waves and the presence of irregularly irregular R-R intervals. This irregular rhythm is the hallmark of atrial fibrillation. Look for fibrillatory waves (f waves) – these small, irregular waves replace the normal P waves.
Confirming atrial fibrillation requires examining the rhythm strip for at least 10 seconds. Count the number of QRS complexes in a 6-second strip; multiply by 10 to estimate the heart rate. Remember, heart rates can vary considerably in AFib, ranging from bradycardia to tachycardia.
Beyond the irregular rhythm, note the QRS morphology. Narrow QRS complexes (less than 0.12 seconds) typically indicate that the AV node is controlling ventricular rate. Wide QRS complexes suggest aberrant ventricular conduction, possibly requiring further investigation.
Important Note: This information provides a basic overview. Accurate diagnosis requires a medical professional’s expertise. This guide is for educational purposes only and should not replace professional medical advice.
