Multiple choice The most common rhythm disturbance during early postoperative period is _________. bradycardia ventricular fibrillation tachycardia complete heart block Reveal answer Fill a bubble to check yourself C Correct answer Explanation Most common complication from posterior superior alveolar nerve block is hematoma, due to insertion of needle too far posteriorly into the pterygoid plexus of veins; in addition, the maxillary artery may be perforated.