Mutu ko chal suru garna lai natural electrical (conduction) system huncha ma. Tyo chal suru garne system ma kunai kharabi bhae heart ko current time ma pugdaina ra mutu ko chal aniyamit huna jancha. Esto condition lai heart block bhanincha ra yo ECG ma dekhincha. Yeska bibhinna grade chan. Usually, second degree heart block bhanda mathi ko lai pacemaker chaincha bhane kunai kunai first degree heart block lai pani pacemaker chaina sakcha. Yo sadhai Cardiologist ko sallah anusar rakhne garincha.