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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

1.3K
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Ventilatory Modes01:14

Ventilatory Modes

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Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
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Decreased pulse rate01:14

Decreased pulse rate

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Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
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Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

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Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
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Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

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Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
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Pulse01:16

Pulse

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When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
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Related Experiment Video

Updated: Jan 4, 2026

Author Spotlight: Investigating HR-Dependent Cardiac Function in Mouse Models Through a Novel Atrial-Pacing Approach
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Diaphragmatic Pacing: Is There a Benefit?

Terra M Hill1, Osita Onugha2

  • 1University of Kansas School of Medicine, Kansas City, KS.

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|November 6, 2019
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Diaphragm pacing stimulates the phrenic nerve to aid breathing, offering an alternative to mechanical ventilation for respiratory failure. This technique may improve functional outcomes in patients with diaphragm dysfunction.

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Area of Science:

  • Respiratory physiology
  • Neuromuscular electrical stimulation

Background:

  • Diaphragm dysfunction leads to respiratory deficits.
  • Mechanical ventilation can cause poor functional outcomes.
  • Phrenic nerve stimulation (diaphragm pacing) is an alternative to mechanical ventilation.

Purpose of the Study:

  • Review literature on diaphragm pacing.
  • Discuss diaphragm dysfunction physiology.
  • Evaluate diaphragm pacing as a treatment for respiratory failure.

Main Methods:

  • Literature review of diaphragm pacing.
  • Analysis of diaphragm dysfunction in various patient populations.

Main Results:

  • Diaphragm pacing can replace or delay mechanical ventilation.
  • Evidence suggests potential benefits for functional outcomes.

Conclusions:

  • Diaphragm pacing is a potentially valuable treatment for respiratory failure.
  • Further research is needed to fully establish its efficacy across patient groups.