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Related Concept Videos

Measurement of Blood Pressure01:17

Measurement of Blood Pressure

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 stethoscope.
Pulse01:16

Pulse

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 indicator...
Pulse01:05

Pulse

The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls between...
Cardiovascular System Abnormal Findings I: Inspection and Palpation01:29

Cardiovascular System Abnormal Findings I: Inspection and Palpation

In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
Pulse amplitude and quality01:17

Pulse amplitude and quality

Pulse amplitude is a crucial indicator of cardiac health because it provides valuable insights into the strength of left ventricular contractions and the overall uniformity of blood circulation within the vasculature. The strength of the pulse is directly related to the force with which the heart contracts and the volume of blood being pumped.
A weak or absent pulse may indicate reduced cardiac output or poor left ventricular contraction, which can be signs of cardiovascular dysfunction or...
Pulse rhythm01:30

Pulse rhythm

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 muscle...

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Related Experiment Video

Updated: May 16, 2026

Increasing Pulmonary Artery Pulsatile Flow Improves Hypoxic Pulmonary Hypertension in Piglets
08:08

Increasing Pulmonary Artery Pulsatile Flow Improves Hypoxic Pulmonary Hypertension in Piglets

Published on: May 11, 2015

Pulsus paradoxus.

Olfa Hamzaoui1, Xavier Monnet, Jean-Louis Teboul

  • 1Hôpitaux Universitaires Paris-Sud, Hôpital Antoine Béclère, Clamart.

The European Respiratory Journal
|December 11, 2012
PubMed
Summary
This summary is machine-generated.

Pulsus paradoxus, an exaggerated drop in systolic blood pressure during inspiration, is a key indicator in diagnosing cardiac tamponade and assessing severe asthma. Its early detection aids in rapid diagnosis and effective patient management.

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Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge
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Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge

Published on: January 20, 2023

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Last Updated: May 16, 2026

Increasing Pulmonary Artery Pulsatile Flow Improves Hypoxic Pulmonary Hypertension in Piglets
08:08

Increasing Pulmonary Artery Pulsatile Flow Improves Hypoxic Pulmonary Hypertension in Piglets

Published on: May 11, 2015

Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge
09:32

Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge

Published on: January 20, 2023

Area of Science:

  • Cardiology
  • Pulmonology
  • Critical Care Medicine

Background:

  • Systolic blood pressure normally decreases during inspiration.
  • Pulsus paradoxus is defined as a >10 mmHg fall in systolic blood pressure during inspiration.
  • It is observed in cardiac tamponade, severe asthma, and COPD exacerbations.

Purpose of the Study:

  • To discuss the pathophysiology and clinical significance of pulsus paradoxus.
  • To highlight its role in diagnosing cardiac tamponade and assessing asthma severity.
  • To mention advancements in noninvasive monitoring.

Main Methods:

  • Review of the physiological mechanisms contributing to pulsus paradoxus.
  • Discussion of clinical observations in various disease states.
  • Consideration of diagnostic and therapeutic implications.

Main Results:

  • Pulsus paradoxus results from decreased left ventricular stroke volume and intrathoracic pressure changes.
  • Biventricular interdependence significantly impacts left ventricular stroke volume during inspiration in tamponade and asthma.
  • Early recognition aids in rapid diagnosis of cardiac tamponade.

Conclusions:

  • Pulsus paradoxus is a crucial sign for diagnosing cardiac tamponade and evaluating acute asthma severity and treatment response.
  • Noninvasive devices for monitoring arterial pressure variations show promise for bedside assessment.