33 results
Loss of Consciousness in Syncope - Differential Diagnosis Framework

Syncopal causes:
• Orthostatic syncope
• Reflex syncope
• Cardiac arrhythmia
•
- Differential ... Diagnosis Framework ... Syncopal causes ... • Reflex syncope ... Nonsyncopal causes
Syncope is a sudden, transient loss of consciousness, which is thought to be secondary to cerebral
frequently benign causes ... such as reflex ... (ruling out differential ... life-threatening causes ... In many cases, syncope
Syncope - Cerebral hypoperfusion leading to transient lsos of consciousness causing alck of postural tone with
Diagnosis: Syncope ... Orthostatic (4-24%) • Reflex ... cause (8-20%) ... • Unclear cause ... #differential #
Causes of Secondary / Provoked Seizures - Differential Diagnosis Algorithm
Febrile
Infection
 • Sepsis
 • Encephalitis
 • Meningitis
Metabolic
Causes of Secondary ... Provoked Seizures - Differential ... Diagnosis Algorithm ... Cardiovascular • Syncope ... #Causes
Shock - Differential Diagnosis by Classification
Reflex Syncope 
 - Vasovagal syncope
   • Prolonged standing
Shock - Differential ... Diagnosis by Classification ... Reflex Syncope ... bradycardia • Sinus pauses ... #Table #Causes
Reversible Neurocognitive Disorders (Reversible Causes of "Dementia")
 • Structural/Mass: Subdural Hematoma, NPH, Intracranial tumor
 • Infection:
Neurocognitive Disorders ... (Reversible Causes ... Subdural Hematoma, NPH ... #dementia #differential ... #diagnosis #causes
Causes of Dizziness / Lightheadedness - Differential Diagnosis Algorithm
Lightheaded, unsteady, disoriented - Non-vertigo
Organic Disease
 • Presyncope/Vasodepressor
Causes of Dizziness ... Diagnosis Algorithm ... /Vasodepressor Syncope ... Anxiety • Panic Disorder ... #Causes
Arrhythmias - Differential Diagnosis Algorithm
May present as: palpitations, dizziness, syncope, chest discomfort
Cardiac Causes:
 - Structural
Arrhythmias - Differential ... Diagnosis Algorithm ... palpitations, dizziness, syncope ... discomfort Cardiac Causes ... Generalized Anxiety Disorder
Syncope - Differential Diagnosis Framework
Reflex Syncope:
• Vasovagal: Prolonged standing, Stress, Pain
• Situational: Coughing, Sneezing, Micturition, Defecation,
Syncope - Differential ... Diagnosis Framework ... Reflex Syncope: ... bradycardia, Sinus pauses ... #Differential #
Prolonged neuromuscular blockade - Differential Diagnosis
- Drugs, Acid-base Disorders, Metabolic, Neurologic, Electrolyte abnormalities

By Mark Harris, MD
neuromuscular blockade - Differential ... Diagnosis - Drugs ... , Acid-base Disorders ... Mark Harris, MD MPH ... #Causes #complications