Warning

Assessment

Patient Presentation: Patients who have had episodes of transient loss of consciousness (TLoC) and do not have a firm diagnosis of uncomplicated faint, situational syncope, orthostatic hypotension, or epileptic seizures.

Initial Assessment:

  • Detailed history of TLoC including any previous events.
  • Medical history and any family history of cardiac disease or inherited cardiac conditions.
  • Drug therapy at the time of TLoC and any subsequent changes.
  • Clinical examination, including full cardiovascular examination and measurement of lying and standing blood pressure.
  • 12-lead ECG and examination of previous ECG recordings if available.

Primary care management

Refer for Ambulatory ECG via SCI Gateway...DGRI...Cardiology...Community Holter - please attach ECG! 

  • Physiologist will triage referral for appropriate investigation based on the referral information:
    • Daily symptoms - 24 hour holter 
    • Several times a week: Holter monitoring (24 - 72 hours).
    • Weekly symptoms: 7 day holder.
    • Less frequent: Event recorder.

Holter results:

  • All holter results will be passed to the cardiologist and the GP will receive a letter with a management plan based on the results

General Information for Patients:

  • Discuss possible causes of their TLoC.
  • Explain benefits and risks of tests offered.
  • Review results of tests performed.
  • Discuss reasons for further investigations.
  • Explain the nature and extent of uncertainty in the diagnosis.

Fitness to Drive:

  • Advise patients who have experienced TLoC and are referred for cardiac assessment not to drive until their assessment is concluded.
  • Refer to DVLA guidelines for assessing fitness to drive.

Who to refer

  • Suspected Structural Heart Disease: Refer to cardiology for further investigation.
  • Suspected Cardiac Arrhythmia: Arrange for appropriate cardiology referral.
  • Unexplained Syncope: If syncope is exercise-induced, arrange for exercise testing unless contraindicated.
  • Recurrent TLoC with Unclear Diagnosis: Consider referral for neurological assessment if psychogenic non-epileptic seizures or psychogenic pseudosyncope are suspected.

Who not to refer

  • Firm Diagnosis in Primary Care: If the diagnosis is clear and management can be undertaken in primary care, such as uncomplicated faint or situational syncope.
  • Single Episode of TLoC with Clear Cause: No referral necessary if the episode is isolated and the cause is identified and managed.

Editorial Information

Last reviewed: 05/11/2025

Next review date: 05/11/2027

Author(s): Sue Bryant.

Version: 1.0

Approved By: Realistic medicine group, GP Sub-committee

Reviewer name(s): Fergus Donachie.