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Blood Pressure Imbalances and Circulatory Shock01:24

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Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
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Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...
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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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Cardiopulmonary Resuscitation IV: Pharmacological Management01:25

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Pharmacologic intervention is crucial in treating cardiac arrest patients during ACLS or Advanced Cardiovascular Life Support. The ACLS algorithms guide the administration of specific drugs based on the patient's cardiac arrest rhythm, which includes pulseless ventricular tachycardia (VT), ventricular fibrillation (VF), asystole, and pulseless electrical activity (PEA).EpinephrineIndication: Epinephrine is the first-line drug for all cardiac arrest rhythms.Mechanism of Action: Epinephrine...
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A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
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Diagnosing Pulmonary EmbolismDiagnosing pulmonary embolism (PE) involves clinical assessment and advanced imaging tests. The preferred diagnostic tool is the spiral (helical) CT scan or CT angiography (CTA), which uses intravenous contrast media to visualize the pulmonary vasculature and identify emboli.A ventilation-perfusion (V/Q) scan is an alternative for patients unable to receive contrast media. This scan includes both perfusion and ventilation scanning. Perfusion scanning involves...
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Related Experiment Video

Updated: Oct 8, 2025

Complete and Partial Aortic Occlusion for the Treatment of Hemorrhagic Shock in Swine
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Complete and Partial Aortic Occlusion for the Treatment of Hemorrhagic Shock in Swine

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An Unusual Case of Obstructive Shock.

Simon Parlow1,2, Matthew Cheung1,2, Louis Verreault-Julien1,2

  • 1CAPITAL Research Group, University of Ottawa Heart Institute, Ottawa, Ontario, Canada.

JACC. Case Reports
|January 5, 2022
PubMed
Summary

A large B-cell lymphoma mass caused severe heart obstruction in a patient. Emergency balloon intervention relieved the blockage, stabilizing the patient's hemodynamics.

Keywords:
DLBCL, diffuse large B-cell lymphomaIVC, inferior vena cavaLV, left ventricularRA, right atrialRV, right ventricularSVC, superior vena cavaTV, tricuspid valvecancercardiac tumorechocardiographyhemodynamicsobstructive shockright-sided catheterization

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Last Updated: Oct 8, 2025

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Area of Science:

  • Cardiology
  • Oncology
  • Pathology

Background:

  • Obstructive shock is a life-threatening condition requiring prompt diagnosis and intervention.
  • Malignancies can rarely present with cardiac involvement, leading to complex clinical scenarios.

Observation:

  • A 54-year-old male presented with profound obstructive shock.
  • Imaging revealed a significant right atrial mass obstructing right ventricular inflow.
  • This obstruction severely compromised cardiac output.

Findings:

  • Emergency balloon catheter intervention successfully relieved the right ventricular inflow obstruction.
  • Hemodynamic stability was achieved post-intervention.
  • Pathology confirmed the mass as diffuse large B-cell lymphoma.

Implications:

  • This case highlights the importance of considering rare cardiac manifestations of lymphoma.
  • Timely interventional procedures can be life-saving in managing obstructive cardiac masses.
  • Multidisciplinary collaboration between cardiology, oncology, and pathology is crucial for optimal patient outcomes.