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Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
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Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.
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Special considerations while measuring blood pressure01:28

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When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
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Low Blood Pressure Threshold for Adverse Outcomes During Left Ventricular Assist Device Support.

Himabindu Vidula1, Onur Altintas2, Scott McNitt1

  • 1Division of Cardiology, Department of Medicine.

The American Journal of Cardiology
|January 22, 2022
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Summary

Maintaining mean arterial pressure (MAP) below 75 mm Hg in patients with a left ventricular assist device (LVAD) is linked to a higher risk of stroke or death. This study identifies a critical MAP threshold for LVAD recipients.

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Area of Science:

  • Cardiology
  • Medical Devices
  • Neurology

Background:

  • Low mean arterial pressure (MAP) in left ventricular assist device (LVAD) recipients may reduce stroke/death risk.
  • The optimal lower limit for MAP in LVAD patients remains undefined.
  • Contemporary data on MAP thresholds and adverse events in LVAD recipients is needed.

Purpose of the Study:

  • To determine the lower limit of the optimal mean arterial pressure (MAP) range in left ventricular assist device (LVAD) recipients.
  • To analyze the association between serial MAP measurements and the risk of stroke/death in LVAD patients.
  • To identify a specific MAP threshold indicative of increased adverse event risk.

Main Methods:

  • Analysis of 86,651 MAP measurements from 309 LVAD patients over a mean follow-up of 1.7 years.
  • Utilized Cox proportional hazards regression modeling to assess the relationship between MAP and stroke/death within 3 years post-discharge.
  • Included patients with various LVAD types, including those with full magnetic levitation of the impeller.

Main Results:

  • A mean arterial pressure (MAP) threshold of ≤75 mm Hg was associated with a significantly increased risk of death (HR 4.74), stroke (HR 2.72), and combined stroke/death (HR 4.45).
  • This increased risk was consistent across diverse patient subgroups, including variations in age, gender, race, device type, renal function, and heart failure status.
  • The findings held true irrespective of the use of blood pressure medications.

Conclusions:

  • Maintaining mean arterial pressure (MAP) at or below 75 mm Hg in left ventricular assist device (LVAD) recipients is associated with a higher risk of stroke and death.
  • The identified MAP threshold of ≤75 mm Hg appears to be a critical factor for adverse outcomes in LVAD patients.
  • These findings underscore the importance of optimizing MAP management in long-term LVAD support to mitigate risks.