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Atrioventricular dissociation due to pheochromocytoma in a young adult

Steven E Haine1, Hielko P Miljoen, Ivan Blankoff

  • 1University Hospital of Antwerp, Edegem, Belgium. Steven.Haine@uza.be

Clinical Cardiology
|September 25, 2010
PubMed

Insights

Pheochromocytoma, a rare tumor, can cause heart rhythm problems like atrioventricular dissociation. Treating this tumor can resolve these cardiac issues, potentially avoiding unnecessary procedures.

Area of Science:

  • Cardiology
  • Endocrinology
  • Oncology

Background:

  • Atrioventricular dissociation (AVD) is often associated with cardiac conditions but can also stem from noncardiac diseases.
  • Supraventricular arrhythmias (SVAs) can be challenging to manage and diagnose, sometimes requiring invasive testing.

Observation:

  • A patient presented with intermittent AVD and medically refractory SVAs, initially considered for pacemaker implantation.
  • Electrophysiological testing did not induce the arrhythmias, suggesting an alternative etiology.
  • The patient's symptoms were ultimately linked to a pheochromocytoma.

Findings:

  • Surgical removal of the pheochromocytoma (left adrenalectomy) led to the complete resolution of both AVD and SVAs.
  • This case highlights the potential for pheochromocytoma to manifest with cardiac rhythm disturbances.

Implications:

  • Early recognition of pheochromocytoma is crucial for managing cardiac arrhythmias and AVD.
  • Diagnosing and treating pheochromocytoma can prevent the need for potentially unnecessary cardiac interventions like electrophysiological testing and pacemaker implantation.
  • This underscores the importance of considering noncardiac causes for complex cardiac presentations.

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