Browse categories and answer follow-up questions to refine your symptom profile.
Immediate stabilization and high-risk triggers
Time-critical priorities
Airway compromise
If airway risk, airway support and escalation
If hypoventilation, bag-valve-mask ventilation
Circulation instability
If SBP <90 mm Hg or shock index >1, resuscitation bay
If ongoing chest pain, acute coronary syndrome pathway
If severe dyspnea or hypoxia, pulmonary embolism pathway
If active GI bleeding, hemorrhage pathway
Neurologic emergency
If persistent focal deficit, stroke pathway
If prolonged altered mental status, broaden differential
Dangerous arrhythmia
If VT, VF, or unstable SVT, ACLS algorithm
If bradycardia with instability, ACLS bradycardia algorithm
Immediate bedside checks
Glucose
If <3.0 mmol/l, dextrose therapy
If >20 mmol/l with dehydration, hyperglycemic emergency pathway
12-lead ECG within 10 minutes
New ischemia
High-grade AV block
Pre-excitation
QTc prolongation
Brugada pattern
Ventricular paced rhythm with symptoms
Continuous cardiac monitoring
Ectopy burden
Pauses
Rate variability
Pulse oximetry
If SpO2 <92% on room air, hypoxemia evaluation
Focused bedside ultrasound when unstable
Pericardial effusion with tamponade physiology
Right ventricular dilation or strain pattern
Poor LV contractility
IVC size and collapsibility trend
Core definitions and initial framing
Clinical framing
Transient loss of consciousness with rapid onset, short duration, complete spontaneous recovery
Syncope
Presyncope without complete LOC
Mimics
ICD-10
R55 syncope and collapse
SNOMED CT concepts
Syncope
Vasovagal syncope
Orthostatic hypotension
Cardiac arrhythmia
Initial classification buckets
Reflex syncope
Vasovagal
Situational
Carotid sinus syndrome
Orthostatic hypotension
Volume depletion
Autonomic failure
Medication-related
Cardiac syncope
Arrhythmic
Structural or obstructive
Non-syncope transient LOC
Seizure
Hypoglycemia
Intoxication
Psychogenic pseudosyncope
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.