Source:http://linkedlifedata.com/resource/umls/id/C0018794
MSH: Impaired conduction of cardiac impulse that can occur anywhere along the conduction pathway, such as between the SINOATRIAL NODE and the right atrium (SA block) or between atria and ventricles (AV block). Heart blocks can be classified by the duration, frequency, or completeness of conduction block. Reversibility depends on the degree of structural or functional defects.,CSP: impairment of conduction in heart excitation; often applied specifically to atrioventricular heart block.,NCI: An impairment of transmission of the cardiac electrical impulse along the fibers normally responsible impulse propagation.