What is the typical LVEF nadir in Takotsubo?

Acute LVEF in Takotsubo is typically 20-40% at nadir. Recovery to >50% occurs in >90% of patients within 4-8 weeks. Sustained LVEF impairment at 3 months suggests alternative diagnosis or complication.

What variants of Takotsubo exist?

Classic (apical, 70-80%): apical ballooning. Mid-ventricular (20%): mid-wall dyskinesis. Basal (2-5%): inverted Takotsubo, apical hyperkinesis. Focal (<2%): localized dyskinesis not in coronary territory.

What triggers Takotsubo cardiomyopathy?

Emotional stress (fear, grief) in 30%; physical stress (medical procedure, illness) in 35%; mixed/spontaneous in 35%. Catecholamine surge and excessive sympathetic stimulation damage cardiomyocytes reversibly.

Takotsubo LV Ballooning LVEF Nadir

Assess Takotsubo cardiomyopathy severity by LV ballooning pattern (apical, mid-ventricular, basal, focal) and acute LVEF nadir. LVEF typically recovers to >50% within 4-8 weeks.

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