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Related Concept Videos

Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
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...
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...

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Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
08:25

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Published on: April 7, 2015

Pneumonia: an arrhythmogenic disease?

Natalia Soto-Gomez1, Antonio Anzueto, Grant W Waterer

  • 1University of Texas Health Science Center, San Antonio TX, USA.

The American Journal of Medicine
|November 27, 2012
PubMed
Summary

A significant number of older adults develop cardiac arrhythmias after pneumonia hospitalization. Risk factors include older age and heart failure, while beta-blockers may offer protection.

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Experimental Model to Evaluate Resolution of Pneumonia
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Published on: February 17, 2023

Area of Science:

  • Cardiology
  • Pulmonology
  • Geriatrics

Background:

  • Pneumonia hospitalization is linked to increased cardiovascular disease risk.
  • Limited data exists on cardiac arrhythmia incidence post-pneumonia.

Purpose of the Study:

  • To determine the incidence of cardiac arrhythmias after pneumonia hospitalization.
  • To identify risk factors associated with post-pneumonia cardiac arrhythmias.

Main Methods:

  • National cohort study of Veterans aged ≥65 hospitalized with pneumonia (2002-2007).
  • Follow-up for 90 days post-admission, analyzing diagnoses of atrial fibrillation, ventricular tachycardia/fibrillation, cardiac arrest, and symptomatic bradycardia.
  • Multilevel regression models adjusted for hospital of admission to identify risk factors.

Main Results:

  • 32,689 patients identified; 12% (3919) developed new cardiac arrhythmias within 90 days.
  • Increased risk associated with older age, congestive heart failure, and need for mechanical ventilation or vasopressors.
  • Beta-blocker use correlated with a decreased incidence of cardiac arrhythmias.

Conclusions:

  • A notable proportion of patients experience new cardiac arrhythmias during/after pneumonia hospitalization.
  • Further research is warranted on cardioprotective medications for pneumonia patients.
  • Monitoring at-risk patients for cardiac arrhythmias during hospitalization is recommended.