Diagnosis and management of stresscardiomyopathy
STRESS CARDIOMYOPATHY (TAKOTSUBO SYNDROME)
Definition
A transient, reversible acute heart failure syndrome characterized by regional LV (ยฑ RV) systolic dysfunction extending beyond a single coronary territory, typically triggered by emotional or physical stress, and not explained by obstructive coronary disease.
DIAGNOSIS
1. Clinical Presentation
Often indistinguishable from ACS at presentation.
Common features
- Acute chest pain / dyspnea
- Syncope or cardiogenic shock (severe cases)
- Preceding emotional or physical stressor (not mandatory)
- Predominantly postmenopausal women
2. ECG Findings
Dynamic and evolving.
| Phase | ECG Pattern |
|---|---|
| Early | ST elevation (often anterior, no reciprocal changes) |
| Intermediate | Deep T-wave inversion |
| Late | Marked QT prolongation |
| Recovery | Gradual normalization |
Key Pearl
- QT prolongation โ risk of torsades
3. Cardiac Biomarkers
- Troponin: Mildโmoderate elevation (disproportionate to ECG changes)
- BNP / NT-proBNP: Markedly elevated
- BNP/Troponin ratio โ higher than in ACS
4. Echocardiography (Cornerstone)
Shows regional wall-motion abnormalities not confined to one vascular territory.
Variants
- Apical ballooning (classic) โ ~70%
- Mid-ventricular
- Basal (reverse Takotsubo)
- Focal
- Global hypokinesia
Assess for complications
- LV outflow tract obstruction (LVOTO)
- LV apical thrombus
- RV involvement
- Acute MR
5. Coronary Angiography
Mandatory in ACS-like presentation
- Normal coronaries or non-obstructive CAD
- Helps exclude plaque rupture
6. Cardiac MRI
Gold standard for tissue characterization
Findings:
- Myocardial edema (T2)
- Absence of late gadolinium enhancement (rules out MI/myocarditis)
- Transient systolic dysfunction
7. Diagnostic Criteria (InterTAK / ESC โ Simplified)
All required:
- Transient LV (ยฑ RV) systolic dysfunction
- Trigger often present (but not mandatory)
- New ECG changes or modest troponin rise
- No evidence of infectious myocarditis
- Reversible myocardial dysfunction
MANAGEMENT
GENERAL PRINCIPLES
- Treat initially as ACS until diagnosis is secured
- Management is supportive and complication-directed
- Avoid therapies that worsen LVOTO or catecholamine excess
1. Acute Phase Management
Hemodynamically Stable (No LVOTO)
- ACE inhibitor / ARB
- Beta-blocker (after stabilization)
- Diuretics if congestion
- Anticoagulation if LV thrombus or EF <30% with apical akinesia
Hemodynamically Unstable
Assess for LVOTO (Critical Step)
2. If LVOTO Present
Avoid
- Inotropes (dobutamine, dopamine)
- Nitrates
- Diuretics (excessive preload reduction)
Preferred
- Beta-blockers (reduce basal hypercontractility)
- IV fluids (optimize preload)
- Phenylephrine if hypotension
- Mechanical support if needed (IABP controversial; Impella preferred)
3. If Cardiogenic Shock Without LVOTO
- Judicious inotropes
- Mechanical circulatory support (Impella / VA-ECMO in refractory cases)
4. Arrhythmia Management
- Monitor QT interval
- Avoid QT-prolonging drugs
- Treat torsades with magnesium
5. Anticoagulation
Indications:
- LV apical thrombus
- Severe apical akinesia with EF <30%
- Continue for 3 months or until LV recovery
LONG-TERM MANAGEMENT
- ACE inhibitor / ARB until LV function normalizes
- Beta-blockers: may reduce recurrence (evidence mixed)
- Stressor identification and management
- Psychiatric evaluation when appropriate
Recovery
- LV function typically normalizes in 3โ6 weeks
PROGNOSIS
- In-hospital mortality: ~3โ5%
- Comparable to ACS in acute phase
- Recurrence: ~5โ10%
- Long-term mortality driven by comorbidities, not cardiomyopathy itself
HIGH-YIELD EXAM PEARLS
- ST elevation + mild troponin + very high BNP โ think Takotsubo
- Wall-motion abnormality beyond a single coronary territory
- No LGE on CMR
- Avoid inotropes if LVOTO present
- QT prolongation โ torsades risk
- Treat as ACS until proven otherwise
Specify the format.
1. In Takotsubo syndrome, which biomarker pattern most reliably differentiates it from STEMI at presentation?
A. Very high troponin with low BNP
B. Normal troponin with modest BNP rise
C. Disproportionately high BNP relative to troponin
D. Elevated CK-MB exceeding troponin
BNP/NT-proBNP rises markedly due to acute HF, while troponin elevation is modest compared with ACS.
2. The most specific CMR feature that excludes myocarditis in suspected Takotsubo is:
A. Presence of myocardial edema
B. Apical ballooning on cine
C. Absence of late gadolinium enhancement
D. Reduced native T1 values
Takotsubo shows edema but characteristically lacks LGE, unlike myocarditis or MI.
3. A hypotensive Takotsubo patient deteriorates after dobutamine. The most likely mechanism is:
A. Acute RV failure
B. Dynamic LV outflow tract obstruction
C. Papillary muscle rupture
D. Coronary spasm
Catecholamine inotropes worsen basal hypercontractility, precipitating LVOTO.
4. Which ECG evolution is most typical of Takotsubo?
A. Persistent ST elevation with Q waves
B. Deep T-wave inversion with QT prolongation
C. Isolated ST depression
D. Normalization within hours
Deep T inversion and QT prolongation occur days after presentation.
5. The strongest indication for anticoagulation in Takotsubo is:
A. Any EF <50%
B. Presence of atrial fibrillation alone
C. Apical akinesia with EF <30% or LV thrombus
D. Elevated D-dimer
Risk of LV apical thrombus mandates anticoagulation until recovery.
6. Which variant is associated with catecholamine excess in pheochromocytoma?
A. Classic apical
B. Mid-ventricular
C. Basal (reverse Takotsubo)
D. Focal
Reverse/basal pattern is linked to catecholamine surge states.
7. Which hemodynamic maneuver improves shock with LVOTO?
A. Nitrates
B. Diuretics
C. Volume loading
D. Dobutamine
Increasing preload reduces LVOTO gradient.
8. Which feature favors Takotsubo over LAD STEMI?
A. Reciprocal ST depression
B. Wall-motion abnormality beyond a single territory
C. Q waves in V1โV4
D. Persistent akinesia at 3 months
Regional dysfunction exceeds one coronary distribution.
9. Most common life-threatening arrhythmia risk in Takotsubo is related to:
A. AV block
B. Ventricular scar
C. QT prolongation leading to torsades
D. Accessory pathways
Prolonged QT predisposes to polymorphic VT.
10. Which statement about coronary angiography is correct?
A. It is optional if echo suggests Takotsubo
B. It should be delayed until troponin falls
C. It is mandatory in ACS-like presentations
D. It must show completely normal coronaries
Non-obstructive CAD may coexist; angiography excludes culprit MI.
11. Which trigger is most often absent yet diagnosis remains valid?
A. Emotional stressor
B. Transient LV dysfunction
C. ECG changes
D. Biomarker rise
A trigger is common but not required per InterTAK criteria.
12. Best vasopressor for hypotension with LVOTO is:
A. Norepinephrine
B. Epinephrine
C. Phenylephrine
D. Dopamine
Pure alpha-agonist increases afterload without inotropy.
13. Typical recovery time of LV function is:
A. 24โ48 hours
B. 3โ6 weeks
C. 3โ6 months
D. Irreversible
Most normalize within weeks.
14. Which echo finding mandates immediate management modification?
A. Mild MR
B. LVOT gradient >30 mmHg
C. Mild TR
D. Small pericardial effusion
LVOTO dictates avoidance of inotropes and preload reduction.
15. Which therapy has the most consistent observational association with improved outcomes?
A. ACE inhibitors / ARBs
B. Long-term dual antiplatelets
C. Chronic nitrates
D. Ivabradine
ACEI/ARB until recovery improves survival signals.
16. Which condition most commonly coexists and worsens prognosis?
A. Stable angina
B. Neurologic disease (stroke, SAH)
C. Mild hypertension
D. Hyperlipidemia
Neuro-triggered Takotsubo carries higher risk.
17. Recurrence risk of Takotsubo is approximately:
A. <1%
B. 5โ10%
C. 20โ30%
D. >40%
Recurrence occurs but is uncommon.
18. Which finding argues AGAINST Takotsubo?
A. Transient RV involvement
B. Modest troponin rise
C. Subendocardial LGE in LAD territory
D. QT prolongation
LGE suggests infarction.
19. Best initial management in ED before confirmation is:
A. Treat as ACS
B. Withhold antiplatelets
C. Start inotropes immediately
D. Delay angiography
Rule out ACS first.
20. Most accurate statement on mortality:
A. Always benign
B. Acute mortality comparable to ACS
C. Higher than STEMI
D. Zero after discharge
Acute phase risk approximates ACS.
21. Which echo parameter predicts adverse outcomes?
A. LV mass
B. RV involvement
C. LA size
D. Mild MR
RV involvement worsens prognosis.
22. Which drug should be avoided due to QT risk?
A. Magnesium
B. Beta-blocker
C. Fluoroquinolone
D. ACE inhibitor
QT-prolonging drugs increase torsades risk.
23. InterTAK score includes all EXCEPT:
A. Female sex
B. Emotional stress
C. Diabetes mellitus
D. Psychiatric disorders
Diabetes lowers probability.
24. Which mechanical support is preferred if needed?
A. IABP always
B. Impella (selected cases)
C. No support ever
D. Permanent LVAD
Impella avoids afterload reduction issues of IABP.
25. Which lab abnormality commonly accompanies Takotsubo?
A. Severe hyponatremia only
B. Elevated catecholamine levels
C. Low cortisol
D. Hyperkalemia as hallmark
Catecholamine surge underlies pathophysiology.
26. Which echo pattern is LEAST common?
A. Apical
B. Mid-ventricular
C. Basal
D. Isolated inferolateral scar
Scar implies infarction, not Takotsubo.
27. Which statement on beta-blockers is true?
A. Contraindicated always
B. Useful after stabilization; recurrence benefit uncertain
C. Mandatory lifelong
D. Increase LVOTO
Evidence mixed for recurrence prevention.
28. Which imaging best assesses myocardial edema?
A. CT calcium scoring
B. CMR T2-weighted imaging
C. PET perfusion
D. Stress echo
T2 sequences demonstrate edema.
29. Which complication requires vigilance during recovery?
A. Chronic constriction
B. Ventricular aneurysm
C. LV thrombus embolization
D. Valvular calcification
Thrombus risk persists until recovery.
30. Which population predominates?
A. Postmenopausal women
B. Young athletes
C. Pediatric patients
D. Equal sex distribution
Strong female predominance.
31. Which lab ratio is helpful early?
A. CK/AST
B. BNP/Troponin
C. LDL/HDL
D. CRP/ESR
High BNP relative to troponin favors Takotsubo.
32. Which condition is a common physical trigger?
A. Stable angina
B. Sepsis
C. Mild anemia
D. Dyslipidemia
Sepsis is a frequent physical stressor.
33. Which echo sign suggests LVOTO?
A. Global hypokinesia
B. Systolic anterior motion of mitral valve
C. Dilated LV
D. Fixed gradient
SAM with dynamic gradient indicates LVOTO.
34. Which statement about CAD coexistence is correct?
A. Excludes Takotsubo
B. May coexist without being causal
C. Always culprit
D. Requires CABG
Non-obstructive or even obstructive CAD can coexist.
35. Most appropriate follow-up imaging is:
A. Coronary CT
B. Echocardiography at 4โ6 weeks
C. Annual angiography
D. PET routinely
Echo documents recovery.
36. Which drug class may worsen outcomes acutely?
A. ACE inhibitors
B. Beta-blockers (careful use)
C. Inotropes in LVOTO
D. Anticoagulants
Inotropes exacerbate LVOTO.
37. Which neurologic condition has strongest association?
A. Migraine
B. Subarachnoid hemorrhage
C. Parkinson disease
D. Peripheral neuropathy
SAH is a classic trigger.
38. Which statement on prognosis is TRUE?
A. Benign long-term regardless
B. Long-term mortality driven by comorbidities
C. Progresses to DCM
D. Requires ICD routinely
Comorbid illness determines outcomes.
39. Which finding supports diagnosis despite normal coronaries?
A. Fixed perfusion defect
B. Reversibility of dysfunction
C. Persistent scar
D. Q waves
Transient dysfunction is key.
40. Best preventive strategy after recovery is:
A. Lifelong DAPT
B. Stressor management + tailored HF therapy
C. Routine ICD
D. Chronic nitrates
Address triggers and continue therapy until recovery.
41. In Takotsubo with LVOTO, the dominant determinant of hypotension is:
A. Reduced LV end-diastolic compliance
B. Dynamic systolic pressure gradient across LVOT
C. Reduced coronary perfusion pressure
D. Fixed valvular aortic stenosis
Hypotension is caused by dynamic obstruction from basal hypercontractility, not fixed afterload or diastolic dysfunction.
42. Which hemodynamic change MOST worsens LVOTO in Takotsubo?
A. Increased afterload
B. Increased preload
C. Reduced preload
D. Bradycardia
Preload reduction (diuretics, nitrates) intensifies LVOTO by narrowing LV cavity.
43. In Takotsubo shock with LVOTO, which parameter best guides therapy at bedside?
A. Troponin trend
B. BNP level
C. Continuous Doppler LVOT gradient
D. Coronary anatomy
Serial LVOT gradient measurement dictates fluid, beta-blocker, and vasopressor strategy.
44. Which CMR feature differentiates Takotsubo from MINOCA?
A. Presence of myocardial edema
B. Transmural dysfunction
C. Edema without ischemic LGE pattern
D. Reduced LVEF
MINOCA usually shows focal ischemic LGE; Takotsubo shows edema without infarct-pattern LGE.
45. Native T1 and T2 mapping in Takotsubo typically show:
A. Normal T1, reduced T2
B. Elevated T1 and elevated T2
C. Reduced T1, normal T2
D. Patchy transmural elevation only
Diffuse myocardial edema elevates both native T1 and T2 without fibrosis.
46. The most common neuro-triggered Takotsubo phenotype is:
A. Focal inferolateral
B. Mid-ventricular isolated
C. Basal (reverse) pattern
D. Pure RV Takotsubo
Catecholamine surges from neuro injury (SAH, stroke) favor basal hyperkinesis.
47. Which neurologic condition carries the HIGHEST in-hospital mortality when associated with Takotsubo?
A. Migraine
B. Epilepsy
C. Subarachnoid hemorrhage
D. TIA
SAH-related Takotsubo has severe catecholamine toxicity and high mortality.
48. In Takotsubo with cardiogenic shock, which scenario CONTRAINDICATES norepinephrine?
A. RV failure
B. Sepsis trigger
C. Significant LVOTO
D. Mild hypotension
Any ฮฒ-agonist effect worsens LVOTO; pure alpha agents are preferred.
49. Which echocardiographic feature differentiates Takotsubo LVOTO from HOCM?
A. Presence of SAM
B. High LVOT gradient
C. Resolution of obstruction with LV recovery
D. MR severity
Takotsubo LVOTO is transient and resolves completely.
50. Which mechanical support is LEAST suitable in Takotsubo with LVOTO?
A. Intra-aortic balloon pump
B. Impella (selected)
C. VA-ECMO (refractory)
D. Conservative support
IABP reduces afterload and can worsen LVOTO.
51. Which feature predicts recurrence rather than acute mortality?
A. RV involvement
B. Psychiatric disorders
C. Cardiogenic shock
D. LVOTO
Psychiatric illness is linked to recurrence risk.
52. Which mapping abnormality may PERSIST after LV functional recovery?
A. LGE
B. Mildly elevated native T1
C. Wall-motion abnormality
D. QT prolongation
Subclinical interstitial changes may persist despite normal EF.
53. Which finding suggests pseudo-MI rather than Takotsubo?
A. Deep T-wave inversion
B. Mild troponin rise
C. Persistent subendocardial LGE
D. High BNP
Persistent ischemic LGE confirms infarction.
54. Which Takotsubo subgroup has the WORST short-term prognosis?
A. Emotional stress-induced
B. Classic apical
C. Physical stress-induced
D. Focal variant
Physical stress triggers correlate with severe illness and mortality.
55. Which feature best explains QT prolongation in Takotsubo?
A. Ischemic scar
B. Electrolyte imbalance alone
C. Diffuse myocardial edema affecting repolarization
D. Conduction system fibrosis
Edema alters action potential duration causing QT prolongation.
56. Which laboratory feature suggests neuro-Takotsubo?
A. High CRP
B. Extreme catecholamine elevation
C. Low BNP
D. High LDL
Neurogenic surge causes extreme catecholamine toxicity.
57. Which clinical clue favors Takotsubo over ACS in ICU patients?
A. Chest pain onset
B. Hypotension
C. Discrepant ECG-troponin severity
D. Elevated CK-MB
Severe ECG changes with modest troponin is classic.
58. Which echocardiographic measurement predicts embolic risk?
A. LV mass
B. Apical akinesia extent
C. LA volume
D. TAPSE
Extensive apical akinesia predisposes to thrombus.
59. Which feature distinguishes Takotsubo from catecholamine myocarditis?
A. Elevated catecholamines
B. Acute HF
C. Absence of inflammatory LGE
D. ECG abnormalities
Myocarditis shows inflammatory LGE patterns.
60. Optimal duration of anticoagulation (if indicated) is:
A. Lifelong
B. Until LV function and wall motion recover
C. 7 days only
D. Until BNP normalizes
Anticoagulation is stopped after documented recovery.
41. In Takotsubo with LVOTO, the dominant determinant of hypotension is:
A. Reduced LV end-diastolic compliance
B. Dynamic systolic pressure gradient across LVOT
C. Reduced coronary perfusion pressure
D. Fixed valvular aortic stenosis
Hypotension is caused by dynamic obstruction from basal hypercontractility, not fixed afterload or diastolic dysfunction.
42. Which hemodynamic change MOST worsens LVOTO in Takotsubo?
A. Increased afterload
B. Increased preload
C. Reduced preload
D. Bradycardia
Preload reduction (diuretics, nitrates) intensifies LVOTO by narrowing LV cavity.
43. In Takotsubo shock with LVOTO, which parameter best guides therapy at bedside?
A. Troponin trend
B. BNP level
C. Continuous Doppler LVOT gradient
D. Coronary anatomy
Serial LVOT gradient measurement dictates fluid, beta-blocker, and vasopressor strategy.
44. Which CMR feature differentiates Takotsubo from MINOCA?
A. Presence of myocardial edema
B. Transmural dysfunction
C. Edema without ischemic LGE pattern
D. Reduced LVEF
MINOCA usually shows focal ischemic LGE; Takotsubo shows edema without infarct-pattern LGE.
45. Native T1 and T2 mapping in Takotsubo typically show:
A. Normal T1, reduced T2
B. Elevated T1 and elevated T2
C. Reduced T1, normal T2
D. Patchy transmural elevation only
Diffuse myocardial edema elevates both native T1 and T2 without fibrosis.
46. The most common neuro-triggered Takotsubo phenotype is:
A. Focal inferolateral
B. Mid-ventricular isolated
C. Basal (reverse) pattern
D. Pure RV Takotsubo
Catecholamine surges from neuro injury (SAH, stroke) favor basal hyperkinesis.
47. Which neurologic condition carries the HIGHEST in-hospital mortality when associated with Takotsubo?
A. Migraine
B. Epilepsy
C. Subarachnoid hemorrhage
D. TIA
SAH-related Takotsubo has severe catecholamine toxicity and high mortality.
48. In Takotsubo with cardiogenic shock, which scenario CONTRAINDICATES norepinephrine?
A. RV failure
B. Sepsis trigger
C. Significant LVOTO
D. Mild hypotension
Any ฮฒ-agonist effect worsens LVOTO; pure alpha agents are preferred.
49. Which echocardiographic feature differentiates Takotsubo LVOTO from HOCM?
A. Presence of SAM
B. High LVOT gradient
C. Resolution of obstruction with LV recovery
D. MR severity
Takotsubo LVOTO is transient and resolves completely.
50. Which mechanical support is LEAST suitable in Takotsubo with LVOTO?
A. Intra-aortic balloon pump
B. Impella (selected)
C. VA-ECMO (refractory)
D. Conservative support
IABP reduces afterload and can worsen LVOTO.
51. Which feature predicts recurrence rather than acute mortality?
A. RV involvement
B. Psychiatric disorders
C. Cardiogenic shock
D. LVOTO
Psychiatric illness is linked to recurrence risk.
52. Which mapping abnormality may PERSIST after LV functional recovery?
A. LGE
B. Mildly elevated native T1
C. Wall-motion abnormality
D. QT prolongation
Subclinical interstitial changes may persist despite normal EF.
53. Which finding suggests pseudo-MI rather than Takotsubo?
A. Deep T-wave inversion
B. Mild troponin rise
C. Persistent subendocardial LGE
D. High BNP
Persistent ischemic LGE confirms infarction.
54. Which Takotsubo subgroup has the WORST short-term prognosis?
A. Emotional stress-induced
B. Classic apical
C. Physical stress-induced
D. Focal variant
Physical stress triggers correlate with severe illness and mortality.
55. Which feature best explains QT prolongation in Takotsubo?
A. Ischemic scar
B. Electrolyte imbalance alone
C. Diffuse myocardial edema affecting repolarization
D. Conduction system fibrosis
Edema alters action potential duration causing QT prolongation.
56. Which laboratory feature suggests neuro-Takotsubo?
A. High CRP
B. Extreme catecholamine elevation
C. Low BNP
D. High LDL
Neurogenic surge causes extreme catecholamine toxicity.
57. Which clinical clue favors Takotsubo over ACS in ICU patients?
A. Chest pain onset
B. Hypotension
C. Discrepant ECG-troponin severity
D. Elevated CK-MB
Severe ECG changes with modest troponin is classic.
58. Which echocardiographic measurement predicts embolic risk?
A. LV mass
B. Apical akinesia extent
C. LA volume
D. TAPSE
Extensive apical akinesia predisposes to thrombus.
59. Which feature distinguishes Takotsubo from catecholamine myocarditis?
A. Elevated catecholamines
B. Acute HF
C. Absence of inflammatory LGE
D. ECG abnormalities
Myocarditis shows inflammatory LGE patterns.
60. Optimal duration of anticoagulation (if indicated) is:
A. Lifelong
B. Until LV function and wall motion recover
C. 7 days only
D. Until BNP normalizes
Anticoagulation is stopped after documented recovery.
