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Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
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Decellularization of Whole Human Heart Inside a Pressurized Pouch in an Inverted Orientation
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A rectangular (quadrangular) heart.

Sanjay Kumar1, Diana Yu2, Jason M Lazar1

  • 1Division of Cardiology, SUNY Downstate Medical Center, Brooklyn, New York, NY, USA.

Journal of Cardiology Cases
|December 12, 2018
PubMed
Summary
This summary is machine-generated.

Severe heart enlargement, particularly of the right side, can create a rectangular shape on chest X-rays. This finding highlights how chamber enlargement impacts cardiac silhouette and diagnosis.

Keywords:
CardiomegalyChest X-rayQuadrangular heartRectangular heart

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Area of Science:

  • Cardiology
  • Radiology
  • Medical Imaging

Background:

  • Cardiac chamber enlargement can significantly alter the cardiac silhouette on chest X-rays.
  • Understanding these morphological changes is crucial for accurate radiological interpretation.

Observation:

  • A case presented with a distinct "rectangular (quadrangular) heart" appearance on chest X-ray.
  • Imaging revealed massive enlargement of the right-sided cardiac chambers.

Findings:

  • The enlarged right atrium and right ventricle overshadowed the left-sided chambers.
  • Severe mitral and tricuspid regurgitation were identified as the primary cause of right-sided heart failure.

Implications:

  • This case illustrates how significant cardiac chamber enlargement can lead to unusual cardiac shapes on chest X-rays.
  • Recognizing the rectangular heart silhouette aids in diagnosing conditions like right-sided heart failure due to valvular disease.