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November 15, 2024Clinical Autonomic ResearchOpen Access

Sympathetic nerve activity and response to physiological stress in Takotsubo syndrome

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Why the study?

Evidence that Takotsubo syndrome is caused by massive sympathetic activation remains inconsistent.

Is sympathetic activity and reactivity enhanced in the recovery phase of Takotsubo syndrome, and does selective β1-receptor blockade affect sympathetic reactivity?

Population

18 female TTS patients and 13 age- and sex-matched controls

Comparison

TTS patients vs controls, and IV metoprolol vs placebo in TTS patients

Design

Case-control study with randomized placebo-controlled crossover component

Authors

CEChristina EkenbäckJPJonas PerssonPTPer Tornvall

Discussion

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Member takes

Overview

No enhanced peripheral sympathetic activity in TTS recovery challenges broad surge hypothesis; leaves open cardiac-specific mechanisms for further study.

Structured PICO

Is sympathetic activity and reactivity enhanced in the recovery phase of Takotsubo syndrome, and does selective β1-receptor blockade affect sympathetic reactivity?

P
Population
18 female patients with Takotsubo syndrome (TTS) and 13 age- and sex-matched controls
I
Intervention
Intravenous metoprolol (in TTS group) and physiological stress (cold pressor test)
C
Comparator
Placebo (for metoprolol comparison) and healthy controls
O
Outcome
Muscle sympathetic nerve activity (burst incidence, burst frequency, burst height, or burst area) measured through microneurography of the peroneal nerve at rest and during the cold pressor testsurrogate

General sympathetic hyperactivity or hyperreactivity is unlikely to contribute to Takotsubo syndrome, though increased cardiac sympathetic activity suggests a localized pathological adrenergic response.

Cite This Study

Ekenbäck et al. (2024) studied this question.

synapsesocial.com/papers/6a852bbeb45929d1c342ec3ehttps://doi.org/10.1007/s10286-024-01082-9
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Also Consider

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  5. 5Sympathetic nerve activity in stress-induced cardiomyopathy2012 · 25 citations