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Related Concept Videos

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...
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
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.
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
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.

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Related Experiment Video

Updated: Jun 18, 2026

Assessing Intracardiac Vortices with High Frame-Rate Echocardiography-Derived Blood Speckle Imaging in Newborns
07:13

Assessing Intracardiac Vortices with High Frame-Rate Echocardiography-Derived Blood Speckle Imaging in Newborns

Published on: December 22, 2023

Biventricular pulsus alternans.

Param Vidwan1, George A Stouffer

  • 1Division of Cardiology, University of North Carolina, Chapel Hill, NC 27599-7075, USA.

Cardiology Research and Practice
|December 1, 2009
PubMed
Summary
This summary is machine-generated.

Pulsus alternans, a rare condition with alternating pulse strength, can affect both ventricles. This case highlights biventricular pulsus alternans in a patient post-myocardial infarction.

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Comprehensive Echocardiographic Assessment of Right Ventricle Function in a Rat Model of Pulmonary Arterial Hypertension
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Area of Science:

  • Cardiology
  • Hemodynamics
  • Clinical Case Reports

Background:

  • Pulsus alternans is a rare hemodynamic phenomenon characterized by alternating systolic pressure variations.
  • It is typically associated with advanced myopathic conditions and impaired cardiac function.
  • Left ventricular and right ventricular pulsus alternans are uncommon, with biventricular involvement being exceedingly rare.

Observation:

  • A 62-year-old female presented with a recent anterior wall myocardial infarction.
  • Cardiac catheterization revealed pulsus alternans affecting both the left and right ventricles.
  • This observation represents a rare instance of biventricular pulsus alternans.

Findings:

  • The patient exhibited significant beat-to-beat variability in systolic pressure.
  • The findings indicate compromised stroke volume in alternate cardiac cycles.
  • Biventricular pulsus alternans was confirmed during the invasive hemodynamic assessment.

Implications:

  • This case underscores the potential for biventricular pulsus alternans in acute myocardial infarction.
  • Understanding this rare condition is crucial for accurate diagnosis and management.
  • Further research into the mechanisms and clinical significance of biventricular pulsus alternans is warranted.