Short-Term Heart Rate Variability Dynamics and Mortality Risk After Acute Coronary Syndrome.

Diagnostics (Basel) · 2026 · PMC13025100 · PMID 41897675

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did not reach statistical significanceno p-value reported

Although median ΔQRS did not change in patients who died, the QRS duration tended to increase in survivors; however, this difference did not reach statistical significance.

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a decreasing trendno p-value reported

In addition to differences in absolute values at 21 days, Δvalues of SDNN, HF, and LF were significantly lower and showed a decreasing trend in patients who died during follow-up ( Table 2 and Table 3 ).

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