Dr. Seema, Dr. Kamna Tiwari, Dr. Ajay Pal Singh and Dr.Sanjay Rawat (2023) “‘’STUDY THE ECG FINDINGS, ECHO FINDINGS AND HOLTER MONITORING FINDINGS IN COPD PATIENT’’”, Journal of Population Therapeutics and Clinical Pharmacology, 30(7), pp. 517–528. doi: 10.53555/jptcp.v30i7.2615.