these arrhythmias include sinus tachycardia , sinoatrial reentrant , atrioventricular nodal reentrant ( dual pathway ) and atrioventricular reciprocating ( concealed bypass tract ) tachycardias , as well as atrial flutter and fibrillation . beta blockers may also be used , in selected patients , to inhibit catecholamine-facilitated accessory pathway function by prolonging refractoriness . beta blockers offer particular clinical advantages , including an acceptable side-effect profile , titratable effect , varied pharmacology and reasonable concordance between efficacy of parenteral and oral dosage forms .
C0003811
arrhythmias
C0004239
atrial flutter