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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
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Dysrhythmias V: Evaluating Dysrhythmias01:30

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Updated: Jul 14, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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Prospective evaluation of patients with syncope: a population-based study.

F P Sarasin1, M Louis-Simonet, D Carballo

  • 1Medical Clinics 1 and 2 and Department of Internal Medicine, Hôpital Cantonal, University of Geneva Medical School, Geneva, Switzerland.

The American Journal of Medicine
|September 1, 2001
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Summary

A standardized syncope evaluation in primary care diagnosed the cause in 76% of patients, higher than previously reported. Electrocardiogram (ECG) risk stratification effectively guided further cardiovascular testing for syncope patients.

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Area of Science:

  • Cardiology
  • Internal Medicine
  • Emergency Medicine

Background:

  • Syncope is a common presenting complaint in emergency departments.
  • Accurate diagnosis of syncope is crucial for patient management and prognosis.
  • Previous diagnostic yields for syncope evaluations have varied widely.

Purpose of the Study:

  • To determine the diagnostic yield of a standardized sequential evaluation for syncope.
  • To assess the effectiveness of clinical assessment and targeted testing in diagnosing syncope.
  • To evaluate the utility of electrocardiogram (ECG)-based risk stratification in guiding further investigations.

Main Methods:

  • Consecutive patients presenting with syncope were enrolled in a primary care teaching hospital.
  • Standardized evaluation included clinical examination, carotid sinus massage, ECG, and basic laboratory tests.
  • Targeted cardiovascular tests and electrophysiologic studies were performed based on clinical suspicion and unexplained syncope.

Main Results:

  • An initial clinical evaluation identified a suspected cause in 69% of patients.
  • Targeted tests confirmed diagnoses in 73% of cases where performed.
  • The overall diagnostic yield of the standardized evaluation was 76%.

Conclusions:

  • A standardized clinical evaluation for syncope achieves a high diagnostic yield in primary care settings.
  • ECG-based risk stratification is valuable for directing specialized cardiovascular testing.
  • This approach improves upon previously reported diagnostic yields for unselected syncope patients.