first aid cases usmle step 2 ck
or thrombolytics). Arrhythmias Atrial Fibrillation: Irregularly irregular pulse, risk of stroke; manage with rate control (beta-blockers or calcium channel blockers) and anticoagulation based on CHA2DS2-VASc score. Ventricular Tachycardia: Palpitations, dizziness; may re