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Related Concept Videos

Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

Cardiomyopathy VII: Pre and Post Operative Nursing Management

Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
Pulmonary Function Tests01:25

Pulmonary Function Tests

Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...

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Related Experiment Video

Updated: Jun 14, 2026

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects
06:57

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects

Published on: February 12, 2021

Preoperative pulmonary function and mortality after cardiac surgery.

A Selcuk Adabag1, Heba S Wassif, Kathryn Rice

  • 1Division of Cardiology, Veterans Affairs Medical Center and University of Minnesota, Minneapolis, MN, USA. adaba001@umn.edu

American Heart Journal
|April 6, 2010
PubMed
Summary

Preoperative pulmonary function tests (PFTs) reclassify chronic obstructive pulmonary disease (COPD) status in many cardiac surgery patients. Impaired lung function identified by PFTs significantly increases operative mortality risk.

Related Experiment Videos

Last Updated: Jun 14, 2026

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects
06:57

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects

Published on: February 12, 2021

Area of Science:

  • Cardiology
  • Pulmonology
  • Thoracic Surgery

Background:

  • Cardiac surgery patients often have undiagnosed or misdiagnosed pulmonary conditions.
  • Preoperative assessment is crucial for optimizing surgical outcomes.

Purpose of the Study:

  • To investigate the association between preoperative pulmonary function and outcomes in patients undergoing cardiac surgery.
  • To determine if pulmonary function tests (PFTs) can improve risk stratification for cardiac surgery.

Main Methods:

  • 1,169 patients undergoing cardiac surgery had preoperative PFTs.
  • Airway obstruction was defined by FEV1/FVC ratio <0.7.
  • Chronic obstructive pulmonary disease (COPD) status was reclassified based on PFT results.

Main Results:

  • PFTs reclassified COPD status in 31% of patients.
  • Moderate to severe airway obstruction (FEV1/FVC <0.7 and FEV1 <80% predicted) was associated with increased operative mortality (6.7% vs 2%).
  • Reduced diffusing capacity of the lung for carbon monoxide (<50% predicted) further elevated mortality risk, especially when combined with airway obstruction.

Conclusions:

  • Preoperative PFTs are valuable for reclassifying COPD status in cardiac surgery candidates.
  • PFTs provide prognostic information beyond current risk models, aiding in better patient management.
  • Incorporating PFT results can enhance preoperative risk assessment for cardiac surgery.