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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...
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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Updated: Feb 21, 2026

Author Spotlight: Unraveling the Impact of Mechanical Ventilation on Diaphragm Function and Patient Outcomes
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Diaphragm Dysfunction After Cardiac Surgery.

Tim Somers1, Sandy Iskander1, Ad F T M Verhagen1

  • 1Department of Cardiothoracic Surgery, Radboud University Medical Centre, Nijmegen, Netherlands.

Brazilian Journal of Cardiovascular Surgery
|June 4, 2025
PubMed
Summary
This summary is machine-generated.

New diaphragm elevation occurs in 27% of cardiac surgery patients. This condition, however, does not increase postoperative complications and typically resolves spontaneously during recovery.

Keywords:
Cardiac SurgeryDiaphragm ElevationPhrenic Nerve Injury

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Area of Science:

  • Cardiology
  • Thoracic Surgery
  • Pulmonology

Background:

  • Diaphragm elevation is a common post-cardiac surgery complication, often linked to phrenic nerve injury.
  • Existing data on diaphragm elevation incidence and recovery post-cardiac surgery is limited and historical.

Purpose of the Study:

  • To determine the contemporary incidence of diaphragm dysfunction after cardiac surgery.
  • To investigate the impact of new diaphragm elevation on postoperative outcomes.

Main Methods:

  • Retrospective review of cardiac surgery patients (sternotomy) from 2015-2016.
  • Chest radiography used to assess diaphragm position and define elevation.
  • Defined right-sided elevation as >3.0 cm difference; left-sided as <0.5 cm difference relative to the right.

Main Results:

  • 1316 patients analyzed; 27% (n=351) developed new postoperative diaphragm elevation.
  • No significant difference in postoperative complications or mortality between groups.
  • 65% of patients with new diaphragm elevation showed spontaneous recovery.

Conclusions:

  • Postoperative diaphragm elevation affects 27% of cardiac surgery patients.
  • New diaphragm elevation is not associated with increased postoperative complications.
  • Spontaneous recovery is common in patients experiencing new diaphragm elevation.