<Tr> <Td_colspan="2"> ECG showing a bundle branch block </Td> </Tr> <Tr> <Th_colspan="2"> Classification and external resources </Th> </Tr> <Tr> <Th> Specialty </Th> <Td> cardiology </Td> </Tr> <Tr> <Th> ICD - 10 </Th> <Td> I44. 4 - I44. 7, I45 </Td> </Tr>

Left bundle branch block contractility and cardiac output