What question did this study set out to answer?

To describe changes in heart rate variability and psychological responses during the acute phase and at six months following acute myocardial infarction.

March 1, 1993Nursing Research

Measurement of Recovery from Myocardial Infarction Using Heart Rate Variability and Psychological Outcomes

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Acute myocardial infarction (AMI) (n=21). Intervention: Time post-AMI (6 months) vs. Acute phase (first 4 days post-AMI). Primary outcome: Kleiger global standard deviation of heart rate variability (msec).

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Key result

In 21 post-AMI men, the Kleiger global standard deviation of heart rate variability increased from a mean of 86 msec during the acute phase to 117 msec at 6 months.

Population

21 post-acute myocardial infarction (AMI) males aged 40 to 83

Design

Cohort

Follow-up

6 months

Authors

LBLynne M. BuchananSeattle Pacific University MCMarie J. CowanUniversity of California, Los Angeles RBRobert L. BurrUniversity of Washington

Discussion

Member takes

Implication

HRV recovery post-AMI may parallel psychological gains; leaves open whether serial monitoring improves risk stratification in larger cohorts.

Key Points

To describe changes in heart rate variability and psychological responses during the acute phase and at six months following acute myocardial infarction.
Prospective pilot study evaluating N = 21 post-acute myocardial infarction males aged 40 to 83 years.
Evaluated psychological outcomes (anxiety, anger, denial, depression) and heart rate variability via time-domain (Kleiger global standard deviation) and frequency-domain autoregressive power spectral density analyses during the first 4 days and at 6 months.
Global standard deviation of heart rate variability increased from 86 (SD = 29) msec during acute myocardial infarction to 117 (SD = 30) msec at 6 months, while state anxiety significantly decreased over the same period.
Autoregressive power spectral density demonstrated an increased high-frequency parasympathetic peak and a decreased low-frequency sympathetic peak at 6 months compared to baseline.
Heart rate variability displayed moderate correlations with state anger (r = .33), denial (r = .35), and education (r = .45), with no other significant psychological correlations identified.

Study Design

Type

Observational (n=21)

Structured PICO

Population

21 male patients aged 40 to 83 recovering from acute myocardial infarction, evaluated during the first 4 days and at 6 months.

Outcome

Heart rate variability (HRV), anxiety, anger, denial, and depression during the first 4 days and 6 months after AMIsurrogate

Main Result

Absolute Event Rate: 117% vs 86%

Heart rate variability and psychological outcomes such as anxiety show measurable improvement over 6 months following an acute myocardial infarction.

Cite This Study

Buchanan et al. (1993) conducted an observational in Acute myocardial infarction (AMI) (n=21). Time post-AMI (6 months) vs. Acute phase (first 4 days post-AMI) was evaluated on Kleiger global standard deviation of heart rate variability (msec). In 21 post-AMI men, the Kleiger global standard deviation of heart rate variability increased from a mean of 86 msec during the acute phase to 117 msec at 6 months.

synapsesocial.com/papers/6a9eeefc6c41c41abd716af8 https://doi.org/10.1097/00006199-199303000-00003

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Implication

HRV recovery post-AMI may parallel psychological gains; leaves open whether serial monitoring improves risk stratification in larger cohorts.