Parthasarathy D. Thirumala, MD

Associate Professor
Co-Director, Center of Clinical Neurophysiology

Parthasarathy Thirumala




Parthasarathy D. Thirumala, MD, joined the Center of Clinical Neurophysiology in June 2008. Dr. Thirumala specializes in intraoperative neurophysiological monitoring to adult and pediatric neurosurgical, orthopedic, ENT, vascular and interventional neuroradiology procedures.

Dr. Thirumala completed his neurology residency and clinical neurophysiology fellowship training at the University of Pittsburgh Medical Center. He completed his internship in internal medicine training at Brookdale University Hospital and Medical Center in Brooklyn, N.Y. Prior to clinical training he completed his masters in biomedical engineering at the University of Illinois at Chicago. Dr. Thirumala completed his medical training in India at Stanley Medical College in Chennai, India.

Prior to joining the department, Dr. Thirumala was in private practice providing intraoperative neurophysiological monitoring services. His group was one of the largest physician groups in the country providing intraoperative neurophysiological to approximately 90 hospitals across 12 states in the United States.

His clinical and research interests include intraoperative neurophysiological monit-oring during expanded endonasal approach, functional cortical mapping during awake craniotomies, ICU EEG.

He has published over 60 peer reviewed articles, book chapters, and invited articles in the journals including JAMA Neurology, Neurology, Neurosurgery, Journal of Neurosurgery, and Journal of Clinical Neurophysiology. He has given lectures both nationally and internationally on the value of intraoperative neurophysiological monitoring.

Specialized Areas of Interest

Intraoperative neurophysiological monitoring; functional cortical mapping during awake craniotomies; neurophysiological monitoring during minimally invasive endonasal approach to skull base surgeries, electroencephalography in the intensive care unit and telemedicine.

Board Certifications

American Board of Clinical Neurophysiology: Intraoperative Monitoring
American Board of Neuroimaging
American Board of Neurophysiologic Monitoring
American Board of Psychiatry and Neurology: Subspecialty Clinical Neurophysiology
American Board of Psychiatry and Neurology

Hospital Privileges

Children’s Hospital of Pittsburgh of UPMC
Jameson Hospital
Magee-Womens Hospital of UPMC
Monongahela Valley Hospital
UPMC Braddock
UPMC Hamot
UPMC Horizon-Greenville
UPMC Mercy
UPMC Passavant
UPMC Presbyterian
UPMC St. Margaret
UPMC Shadyside

Professional Organization Membership

American Academy of Neurology
American Clinical Neurophysiology Society
American Medical Association
American Society of Neurophysiological Monitoring
American Society of Electroneurodiagnostic Technologists
American Telemedicine Association

Education & Training

MBBS, Stanley Medical College, 1997
MS, University of Illinois, Bioengineering, 2001
Residency, Neurology, University of Pittsburgh, 2006
Fellowship, Clinical Neurophysiology, University of Pittsburgh, 2007

Selected Publications

Thirumala PD, Krishnaiah B, Habeych M, Crammond DJ, Balzer J, Hearing outcomes after loss of brainstem auditory evoked potentials during microvascular decompression. Journal of Clinical Neuroscience 22(4):659-63, 2015.

Thirumala PD, Kumar H, Bertolet M, Habeych ME, Crammond DJ, Balzer JR Risk factors for cranial nerve deficits during carotid endarterectomy: a retrospective study. Clin Neurol Neurosurg 130:150-4, 2015.

Thirumala P, Meigh K, Dasyam N, Shankar P, Sarma KR, Sarma DR, Habeych M, Crammond D, Balzer J.  The incidence of high-frequency hearing loss after microvascular decompression for trigeminal neuralgia, glossopharyngeal neuralgia, or geniculate neuralgia. J Neurosurg 1:1-7, 2015.

Thirumala PD, Wang X, Shah A, Habeych M, Crammond D, Balzer JR, Sekula R. Clinical impact of residual lateral spread response after adequate microvascular decompression for hemifacial spasm: A retrospective analysis. Br J Neurosurg 22:1-5, 2015.

Nwachuku EL, Yabes YG, Crammond DJ, Habeych ME, Balzer JR, Thirumala PD, Diagnostic Value of Somatosensory Evoked Potential (SSEP) Changes During Carotid Endarterectomy JAMA Neurol 72(1):73-80, 2015.

Habeych M, Thirumala PD, Crammond DJ, Balzer J Intraoperative neurophysiological monitoring of microvascular decompression for Glossopharyngeal neuralgia. Journal of Clinical Neurophysiology. J Clin Neurophysiol 31(4):337-43, 2014.

Mohanraj S, Thirumala PD, , Habeych M, Crammond DJ, Balzer J.Appropriate time to establish baseline responses for brainstem auditory evoked potentials during microvascular decompression for hemifacial spasm. J Clin Neurophysiol 31(5):500-4, 2014.

Thirumala PD, Bodily L, Tint D, Ward TW, Deeney VF, Crammond D, Habeych ME, Balzer JR. Somatosensory evoked potential monitoring during instrumented scoliosis corrective procedures: validity revisited. Spine J 14(8):1572-80, 2014.

Thirumala PD, Krishnaiah B, Habeych M, Crammond DJ, Balzer J Analysis of Wave III of Brain stem Auditory Evoked Potential Waveforms During Microvascular Decompression of Cranial Nerve VII for Hemifacial Spasm. J Clin Neurophysiol 31(2):127-32, 2014.

Ying T, Thirumala P, Chang Y, Habeych M, Crammond D, Balzer J. Emprical factors associated with Brainstem auditory evoked potential monitoring during microvascular decompression for hemifacial spasm and its correlation to hearing loss. Acta Neurochir (Wien) 156(3):571-5, 2014.

A complete list of Dr. Thirumala's publications can be reviewed through the National Library of Medicine's publication database.

Research Activities

Perioperative neurological events like stroke, spinal cord injury, and delirium are new neurological disorders which are seen after a surgical procedure. In prospective clinical trials and small representative samples, patients who undergo cardiac, neurosurgical and non cardiac- non neurosurgery procedures are at increased risk of perioperative neurological events. In fact perioperative stroke, defined as neurologic deficits developing within 30 days of the procedure, is one of the most devastating complications after cardiac surgeries, occurring in 1 to 2% of CABG patients in the perioperative period leading to 5,000 to 35,000 case each year. Dr. Thirumala’s primary aim in this study is to evaluate the risk of in-hospital mortality and morbidity in patients with an episode of perioperative neurological events after surgical procedure using a state-wise database. His secondary aim is to evaluate the risk factors of unplanned readmissions in patients with perioperative neurological events. Data will be abstracted from the Healthcare Cost and Utilization Project (HCUP) California State Inpatient Databases (SID) for the years 2001 to 2011. Dr. Thirumala will identify several patient level and hospital level covariates, including the patient’s age, sex, ethnicity, admission type and status. He will identify various preoperative comorbidities and risk factors.