Emergency Medicine
Syncope Admission Criteria
Admit syncope patients when a serious condition is identified or suspected after focused evaluation. Use ECG, hemodynamics, cardiac history, troponin, and clinical impression to distinguish patients needing inpatient treatment from those appropriate for discharge or structured observation.
Disposition
Admit when syncope is linked to a serious condition
Disposition follows cause and short-term risk, not the symptom alone.
Perform a focused initial assessment that establishes whether syncope is attributable to a serious condition requiring inpatient treatment. Hospital evaluation and treatment are recommended when such a condition is identified or is potentially relevant to the event. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and Management ...
Admission is favored for suspected cardiac syncope because cardiac syncope carries substantially greater mortality than noncardiac syncope; reported 1-year mortality is 18% to 33% with cardiac syncope versus 3% to 4% without a cardiac cause. PubMedPubMedPREDICTING ADVERSE OUTCOMES IN SYNCOPE - PMC Cardiac etiologies requiring expedited evaluation include arrhythmia, conduction disease, cardiomyopathy, valvular heart disease, ischemia, and acute thromboembolic disease. PubMed+1PubMedCardiac findings and observation duration in patients with syncope in the emergency department: a cohort studyPubMedRisk stratification of adult emergency department syncope patients to predict short-term serious outcomes after discharge (RiSEDS) study
Do not admit solely because the cause remains unexplained if the history supports reflex or orthostatic syncope, ECG and hemodynamics are reassuring, and no serious condition is suspected. A substantial proportion of ED syncope evaluations remain etiologically unresolved, but low-risk patients with a readily identified noncardiac mechanism generally do not benefit from hospitalization. ScienceDirect+1ScienceDirectSyncope risk stratification in the ED - ScienceDirectPubMedRisk stratification of adult emergency department syncope patients to predict short-term serious outcomes after discharge (RiSEDS) study
Admit for a serious diagnosis made in the ED when inpatient therapy is needed, such as pacemaker implantation for clinically significant bradyarrhythmia or transfusion for gastrointestinal hemorrhage/anemia. ScienceDirect+1ScienceDirectRisk Stratification of Older Adults Who Present to the Emergency Department With Syncope: The FAINT ScorePubMedRandomized Clinical Trial of an Emergency Department Observation Syncope Protocol vs. Routine Inpatient Admission
Admit when delayed evaluation could expose the patient to an adverse outcome from acute coronary syndrome, conduction disease, worrisome cardiac disease, significant valvular disease, or a familial sudden-death syndrome. PubMedPubMedPREDICTING ADVERSE OUTCOMES IN SYNCOPE - PMC
Use age as a modifier rather than an isolated admission criterion: patients older than 75 years have poorer fatal and nonfatal outcomes, compounded by multimorbidity, frailty, and injury risk. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC
Risk Assessment
Identify high-risk features before assigning a disposition
Use history, vital signs, ECG, and targeted laboratory testing to detect actionable risk.
Obtain a 12-lead ECG and treat it as a disposition-changing test. Acute ischemic changes, dysrhythmia, significant conduction abnormality, prolonged QT interval, and bundle-branch block are high-risk findings that support hospital-based evaluation. PubMedPubMedRisk stratification of adult emergency department syncope patients to predict short-term serious outcomes after discharge (RiSEDS) study In an older-adult cohort, an abnormal ECG independently predicted 30-day serious events. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope
Interpret ED blood pressure at both extremes. Canadian Syncope Risk Score predictors include mean ED systolic blood pressure below 90 mm Hg or above 180 mm Hg. PubMedPubMedBenefit of hospital admission for detecting serious adverse events among emergency department patients with syncope: a propensity-score–matched analysis of a multicentre prospective cohort - PMC In older patients, triage systolic blood pressure above 160 mm Hg was associated with 30-day serious events, alongside age older than 90 years, male sex, known arrhythmia, abnormal ECG, and elevated troponin I. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope
Order troponin when clinical evaluation raises concern for ischemia or cardiac risk, then incorporate an elevated result into disposition rather than treating it as an isolated screening abnormality. Elevated troponin is a Canadian Syncope Risk Score predictor and independently predicted 30-day serious events in older adults. PubMed+1PubMedPredictors of 30-Day Serious Events in Older Patients with SyncopePubMedBenefit of hospital admission for detecting serious adverse events among emergency department patients with syncope: a propensity-score–matched analysis of a multicentre prospective cohort - PMC Assess dyspnea, anemia or bleeding, heart failure, and symptoms of acute coronary syndrome because each can reveal a nonarrhythmic cause that requires admission and treatment. ScienceDirect+2ScienceDirectSyncope as an Emergency Department Presentation of Pulmonary EmbolismPubMedRisk stratification of adult emergency department syncope patients to predict short-term serious outcomes after discharge (RiSEDS) studyPubMedPREDICTING ADVERSE OUTCOMES IN SYNCOPE - PMC
Known heart disease, history of arrhythmia, heart failure, ventricular arrhythmia, or physical findings of valvular disease increase concern for cardiac syncope. PubMed+2PubMedPredictors of 30-Day Serious Events in Older Patients with SyncopePubMedRisk stratification of adult emergency department syncope patients to predict short-term serious outcomes after discharge (RiSEDS) studyPubMedPREDICTING ADVERSE OUTCOMES IN SYNCOPE - PMC
Family history of sudden death is a medium-risk feature that should lower the threshold for monitored cardiac evaluation, particularly with abnormal ECG findings or unexplained syncope. PubMedPubMedRisk stratification of adult emergency department syncope patients to predict short-term serious outcomes after discharge (RiSEDS) study
Near-syncope was associated with lower 30-day event risk than true syncope in one older-adult cohort, but should not override abnormal ECG, troponin, hemodynamics, or a concerning cardiac history. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope
Etiologic Branches
Use the suspected mechanism to select admission, observation, or discharge
A named mechanism is more useful than undifferentiated “unexplained syncope.”
For suspected arrhythmic syncope, admit or observe with cardiac monitoring when the ECG is abnormal, there is known arrhythmia or structural heart disease, or the event remains unexplained with a concerning cardiac history. Arrhythmia was the most common serious event detected after an initially unrevealing ED evaluation in older adults. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope During syncope observation studies, clinically significant events included ventricular arrhythmia, Mobitz II or complete heart block, sick sinus syndrome, sinus pause longer than 3 seconds, symptomatic supraventricular tachycardia above 100 beats/min, and symptomatic bradycardia below 60 beats/min. PubMedPubMedRandomized Clinical Trial of an Emergency Department Observation Syncope Protocol vs. Routine Inpatient Admission
For reflex or orthostatic syncope, discharge is reasonable when the mechanism is clinically apparent and there is no cardiac concern. Review medications because diuretics, vasodilators, venodilators, negative chronotropes, and sedatives are implicated in medication-related syncope, particularly among older adults; adjust these agents under close supervision when medication effect is plausible. jacc+2jacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACCScienceDirectSyncope risk stratification in the ED - ScienceDirectPubMedCardiac findings and observation duration in patients with syncope in the emergency department: a cohort study
For secondary serious causes, admit according to the identified disease rather than a generic syncope pathway. Dyspnea, hematocrit below 30%, systolic pressure below 90 mm Hg, and heart-failure history are high-risk features in the San Francisco Syncope Rule and should direct evaluation toward pulmonary, hemorrhagic, hemodynamic, or cardiac disease. ScienceDirectScienceDirectSyncope as an Emergency Department Presentation of Pulmonary Embolism Serious-event definitions in syncope research include myocardial infarction, pulmonary embolism, aortic dissection, structural heart disease, pulmonary hypertension, and serious arrhythmia. PubMedPubMedDevelopment of a Novel Emergency Department Quality Measure to Reduce Very Low-Risk Syncope Hospitalizations
Obtain echocardiography selectively when history, examination, or ECG suggests structural cardiac disease; echocardiography was requested substantially more often among patients classified with cardiac versus neurally mediated or orthostatic syncope. PubMedPubMedCardiac findings and observation duration in patients with syncope in the emergency department: a cohort study
Do not use a normal-appearing patient after recovery as reassurance when high-risk ECG, cardiac-history, troponin, or hemodynamic findings persist; serious arrhythmia may be missed at the index evaluation. PubMed+1PubMedPredictors of 30-Day Serious Events in Older Patients with SyncopePubMedPREDICTING ADVERSE OUTCOMES IN SYNCOPE - PMC
Consider the injury and functional consequences of recurrence in older adults: recurrent syncope can precipitate trauma, nursing-home placement, and loss of independence, factors that may affect the safety of discharge even when a malignant rhythm is not established. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC
Intermediate Risk
When ED observation can replace routine admission
Observation is a disposition pathway for selected patients, not a substitute for treating an identified emergency.
Consider a structured ED observation protocol for intermediate-risk adults, particularly those aged 50 years or older, when initial evaluation does not identify a condition requiring inpatient treatment. A randomized trial compared an ED observation syncope protocol with routine inpatient admission in this population. annemergmed+1annemergmedRandomized Clinical Trial of an Emergency Department ...PubMedRandomized Clinical Trial of an Emergency Department Observation Syncope Protocol vs. Routine Inpatient Admission Observation should include monitoring directed at detecting the rhythm and structural diagnoses that would change management. PubMedPubMedRandomized Clinical Trial of an Emergency Department Observation Syncope Protocol vs. Routine Inpatient Admission
Escalate from observation to inpatient admission when telemetry or targeted testing identifies ventricular arrhythmia, high-grade atrioventricular block, sinus node dysfunction, significant pauses, symptomatic tachyarrhythmia, symptomatic bradycardia, or another serious diagnosis requiring treatment. PubMedPubMedRandomized Clinical Trial of an Emergency Department Observation Syncope Protocol vs. Routine Inpatient Admission Patients classified as having cardiac syncope were more likely than those with neurally mediated or orthostatic syncope to require observation of at least 12 hours, pacemaker implantation, and hospitalization. PubMedPubMedCardiac findings and observation duration in patients with syncope in the emergency department: a cohort study
Use clinical risk scores to organize variables, not to disregard clinician concern. Canadian Syncope Risk Score components include blood-pressure extremes, vasovagal predisposition, heart disease, final ED diagnosis, elevated troponin, QRS duration at least 130 ms, marked QRS-axis abnormality, and corrected QT interval above 480 ms. PubMedPubMedBenefit of hospital admission for detecting serious adverse events among emergency department patients with syncope: a propensity-score–matched analysis of a multicentre prospective cohort - PMC In a propensity-matched cohort, admission produced little incremental in-hospital detection of serious outcomes among very-low- and low-risk groups, whereas the difference was more pronounced in medium-, high-, and very-high-risk groups. PubMedPubMedBenefit of hospital admission for detecting serious adverse events among emergency department patients with syncope: a propensity-score–matched analysis of a multicentre prospective cohort - PMC
A high-risk older-adult profile includes age above 90 years, male sex, known arrhythmia, triage systolic pressure above 160 mm Hg, abnormal ECG, and abnormal troponin I. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope
Intermediate-risk disposition should account for whether the needed diagnostic test or intervention can be completed safely within an observation setting. jacc+1jacc2017 ACC/AHA/HRS Guideline for the Evaluation and Management ...PubMedRandomized Clinical Trial of an Emergency Department Observation Syncope Protocol vs. Routine Inpatient Admission
When a serious disease is already evident, bypass risk scoring and admit for treatment of that condition. jacc+1jacc2017 ACC/AHA/HRS Guideline for the Evaluation and Management ...ScienceDirectRisk Stratification of Older Adults Who Present to the Emergency Department With Syncope: The FAINT Score
Older Adults
Lower the threshold for monitored care in frail older adults
Age does not mandate admission, but it changes the consequences of diagnostic error and recurrent events.
Older patients have greater hospitalization and death risk after syncope, with risk compounded by multimorbidity, frailty, and more consequential fall-related injury. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC Among patients older than 80 years presenting to the ED with syncope, 58% were admitted in national survey data. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC Use this context to assess whether discharge is functionally safe, especially after an injurious event or when recurrent syncope threatens independence. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC
Medication review is a required part of the evaluation in older adults. Diuretics, vasodilators, venodilators, negative chronotropes, and sedatives have been implicated in syncope; medication-related syncope appears more prevalent in older patients. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC If medications are a plausible contributor and serious cardiac disease is not suspected, adjust the responsible regimen with close follow-up rather than defaulting to an extensive inpatient diagnostic admission. jacc+1jacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACCScienceDirectSyncope risk stratification in the ED - ScienceDirect
Do not attribute syncope to medications or orthostasis without first addressing competing high-risk findings. In older cohorts, known arrhythmia, abnormal ECG, and elevated troponin I predicted 30-day serious events, and arrhythmia was the most common serious diagnosis made after the ED evaluation. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope
Treat age above 90 years as a risk marker when combined with abnormal ECG, troponin, known arrhythmia, or concerning vital signs. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope
Consider observation or admission when recurrent syncope creates unacceptable trauma or functional risk despite a noncardiac mechanism. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC
When medication adjustment is undertaken, supervise closely because changing one agent may worsen preexisting supine hypertension or other comorbid conditions. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC
| Finding | Why it changes disposition | Action |
|---|---|---|
| Frailty, recurrent events, or injury | Syncope-related falls and recurrent events can lead to trauma, institutionalization, and loss of independence. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC | Incorporate home safety and functional consequences into discharge planning; observe or admit if recurrence risk cannot be managed safely. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC |
| Potential medication contribution | Diuretics, vasodilators, venodilators, negative chronotropes, and sedatives are implicated in syncope. jaccjacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC | Review and adjust likely contributors with close supervision after excluding serious cardiac disease. jacc+1jacc2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACCScienceDirectSyncope risk stratification in the ED - ScienceDirect |
| Abnormal ECG or troponin | Both predicted 30-day serious events in older adults. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope | Use monitored evaluation and investigate cardiac causes rather than attributing symptoms to age or polypharmacy. PubMedPubMedPredictors of 30-Day Serious Events in Older Patients with Syncope |
References
- 2017 ACC/AHA/HRS Guideline for the Evaluation and ... - JACC — www.jacc.org · www.jacc.org
- 2017 ACC/AHA/HRS Guideline for the Evaluation and Management ... — www.jacc.org · www.jacc.org
- ACC/AHA/HRS Versus ESC Guidelines for the Diagnosis ... - JACC — www.jacc.org · www.jacc.org
- Risk Stratification of Older Adults Who Present to the Emergency Department With Syncope: The FAINT Score — www.sciencedirect.com · www.sciencedirect.com
- Syncope risk stratification in the ED - ScienceDirect — www.sciencedirect.com · www.sciencedirect.com
- Syncope as an Emergency Department Presentation of Pulmonary Embolism — www.sciencedirect.com · www.sciencedirect.com
- Syncope in the Emergency Department: Should We Be Using the Canadian Syncope Risk Score? - Annals of Emergency Medicine — www.annemergmed.com · www.annemergmed.com
- ESC 365 - Management of syncope in the emergency department based on risk stratification — esc365.escardio.org · esc365.escardio.org
- Measurement of Observer Agreement | Radiology - RSNA Journals — pubs.rsna.org · pubs.rsna.org
- Predictors of 30-Day Serious Events in Older Patients with Syncope — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Cardiac findings and observation duration in patients with syncope in the emergency department: a cohort study — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Risk stratification of adult emergency department syncope patients to predict short-term serious outcomes after discharge (RiSEDS) study — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- PREDICTING ADVERSE OUTCOMES IN SYNCOPE - PMC — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Randomized Clinical Trial of an Emergency Department ... — www.annemergmed.com · www.annemergmed.com
- Randomized Clinical Trial of an Emergency Department Observation Syncope Protocol vs. Routine Inpatient Admission — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Benefit of hospital admission for detecting serious adverse events among emergency department patients with syncope: a propensity-score–matched analysis of a multicentre prospective cohort - PMC — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Development of a Novel Emergency Department Quality Measure to Reduce Very Low-Risk Syncope Hospitalizations — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov