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Imaging Studies for Cardiovascular System II:Types of Echocardiography

Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
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Related Experiment Video

Updated: May 12, 2026

Functional Transcranial Doppler Ultrasound for Monitoring Cerebral Blood Flow
09:41

Functional Transcranial Doppler Ultrasound for Monitoring Cerebral Blood Flow

Published on: March 15, 2021

Transcranial Doppler identifies a malfunctioning extraventricular drain.

David R Mayans1, Dana B Meads, Patrick S Reynolds

  • 1From the Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, NC, 27517.

Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging
|April 13, 2013
PubMed
Summary

Transcranial Doppler (TCD) monitoring detected a sudden increase in intracranial pressure (ICP) caused by a faulty drain. This early detection via TCD allowed for prompt intervention, saving the patient's life.

Keywords:
Transcranial Dopplerextraventricular drainintra-cranial pressure

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Analysis of Cerebral Vasospasm in a Murine Model of Subarachnoid Hemorrhage with High Frequency Transcranial Duplex Ultrasound
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Last Updated: May 12, 2026

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Analysis of Cerebral Vasospasm in a Murine Model of Subarachnoid Hemorrhage with High Frequency Transcranial Duplex Ultrasound
10:41

Analysis of Cerebral Vasospasm in a Murine Model of Subarachnoid Hemorrhage with High Frequency Transcranial Duplex Ultrasound

Published on: June 3, 2021

Area of Science:

  • Neurology
  • Critical Care Medicine
  • Medical Devices

Background:

  • Subarachnoid hemorrhage (SAH) can lead to serious complications like vasospasm and increased intracranial pressure (ICP).
  • Continuous monitoring is essential for managing critically ill patients with SAH.
  • Transcranial Doppler (TCD) ultrasound is a non-invasive tool for assessing cerebral blood flow velocities.

Observation:

  • A case is presented where TCD monitoring in a patient with SAH revealed unexpected blood flow velocity changes.
  • These changes were indicative of a sudden rise in ICP, not related to vasospasm as initially suspected.
  • The ICP elevation was attributed to a malfunctioning extraventricular drain (EVD).

Findings:

  • TCD monitoring successfully identified a critical complication (malfunctioning EVD leading to increased ICP) in real-time.
  • The primary medical team was alerted to the abnormal TCD findings.
  • Revision of the EVD resulted in the normalization of ICP and TCD parameters.

Implications:

  • This case highlights the utility of TCD in detecting non-vasospastic complications affecting ICP after SAH.
  • Serial TCD monitoring can provide crucial physiological data for timely interventions in critical care.
  • TCD's portability, low cost, and real-time capabilities make it a valuable tool for managing high-risk neurological patients.