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Hyperpnea and Hyperventilation01:25

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Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...
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Measurement of Blood Pressure01:17

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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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Oxygen therapy has emerged as a significant tool in enhancing the quality of life for patients suffering from pulmonary arterial hypertension (PAH). While this therapy has principally been studied on patients with significant hypoxemia, this therapeutic approach helps prevent potential organ damage and can be administered in the comfort of one's home.
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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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Alterations in Blood Pressure01:30

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Alterations in blood pressure, such as hypertension (high blood pressure) and hypotension (low blood pressure), significantly affect human health. Understanding these conditions' classifications, causes, and symptoms is essential for effective management and treatment.
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Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
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Supramaximal Intensity Hypoxic Exercise and Vascular Function Assessment in Mice
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No Decrease in Blood Pressure After an Acute Bout of Intermittent Hyperpnea and Hypoxia in Prehypertensive Elderly.

Jan Stutz1, Ruben Oliveras1, Remo Eiholzer1

  • 1Exercise Physiology Lab, Institute of Human Movement Sciences and Sport, ETH Zürich, Zurich, Switzerland.

Frontiers in Physiology
|October 30, 2020
PubMed
Summary

A single session of respiratory muscle training (RMT), with or without intermittent hypoxia (IH), did not significantly lower blood pressure or improve sleep quality in prehypertensive elderly individuals.

Keywords:
blood pressureelderlyhyperpneahypertensionhypoxiarespiratory muscle trainingsleepventilation

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Area of Science:

  • Cardiovascular Physiology
  • Sleep Medicine
  • Respiratory Training

Background:

  • Hypertension, poor sleep, and snoring prevalence increase with age.
  • Worse sleep and snoring are independent risk factors for developing hypertension.
  • Respiratory muscle training (RMT) and intermittent hypoxia (IH) show potential benefits for these conditions.

Purpose of the Study:

  • To investigate the acute effects of a single respiratory muscle training (RMT) session on resting blood pressure (BP) and sleep in prehypertensive elderly individuals.
  • To compare the effects of RMT alone versus RMT combined with intermittent hypoxia (IH).

Main Methods:

  • Fourteen prehypertensive elderly participants underwent three randomized 60-minute sessions: normocapnic hyperpnea (HYP) alone, HYP with IH (HYP&IH), and a sham intervention.
  • Blood pressure, hemodynamics, heart rate variability (HRV), baroreflex sensitivity (BRS), and pulse wave velocity (PWV) were measured pre- and post-intervention.
  • Sleep variables were assessed using actigraphy, pulse oximetry, and questionnaires.

Main Results:

  • Neither HYP nor HYP&IH interventions resulted in a significant decrease in systolic or diastolic blood pressure.
  • No significant effects were observed for HRV, BRS, or PWV across interventions.
  • A trend towards reduced sleep fragmentation was noted after HYP and HYP&IH compared to sham, but pairwise comparisons were not significant.

Conclusions:

  • A single bout of intermittent hyperpnea, whether combined with intermittent hypoxia or not, is ineffective in acutely lowering blood pressure in prehypertensive elderly individuals.
  • This intervention also did not demonstrate significant improvements in sleep quality in the studied population.
  • Further research may be needed to explore the long-term effects or different protocols of respiratory training for managing hypertension and sleep disturbances.