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Related Concept Videos

Phasors01:12

Phasors

Phasors are a powerful mathematical tool used to analyze alternating current (AC) circuits. They provide a complex number representation of sinusoids, with the magnitude of the phasor equating to the amplitude of the sinusoid and the angle of the phasor representing the phase measured from the positive x-axis.
One of the significant benefits of using phasors is that they simplify the analysis of AC circuits by eliminating the time dependence of the current and voltage. This transformation...
Introduction to Language of Pathophysiology ll01:17

Introduction to Language of Pathophysiology ll

This lesson explores key terms that describe how diseases progress, their outcomes, and their distribution in populations.Diagnostic tests identify diseases and monitor treatment. These include blood and urine tests, biopsies, imaging (X-ray, MRI), and detection of infectious agents.Remission is a reduction or disappearance of symptoms.Exacerbation refers to the worsening of symptoms, such as increased wheezing during an asthma attack.A precipitating factor triggers an acute episode, while a...
Introduction to Language of Pathophysiology l01:25

Introduction to Language of Pathophysiology l

Pathophysiology investigates how biological mechanisms—typically starting at the cellular level—disrupt normal bodily functions. It bridges anatomy and physiology to explain the progression of disease. With this foundation, it is important to understand the following key terms used to describe disease processes: Diagnosis:The process of identifying a disease using clinical evaluation, including signs (objective evidence like rashes), symptoms (subjective experiences like pain), laboratory test...
Pleural Disorders: Types and Brief Description01:30

Pleural Disorders: Types and Brief Description

The pleura is a vital part of the respiratory system. It's a double-layered membrane surrounding the lungs and lining the chest cavity. The two layers of the pleura are:
Cystic Fibrosis: Pathogenesis01:23

Cystic Fibrosis: Pathogenesis

Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation, but...
Phasor Arithmetics01:13

Phasor Arithmetics

Phasors and their corresponding sinusoids are interrelated, offering unique insights into the behavior of alternating current (AC) circuits. One way to understand this relationship is through the operations of differentiation and integration in both the time and phasor domains.
When the derivative of a sinusoid is taken in the time domain, it transforms into its corresponding phasor multiplied by j-omega (jω) in the phasor domain, where j is the imaginary unit, and ω is the angular frequency.

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PHACES syndrome: a review.

David A Hartemink1, Yvonne E Chiu, Beth A Drolet

  • 1Department of Otolaryngology and Communication Science, Medical College of Wisconsin, Milwaukee, WI, USA. dhartemi@mcw.edu

International Journal of Pediatric Otorhinolaryngology
|December 23, 2008
PubMed
Summary
This summary is machine-generated.

Large hemangiomas in the head and neck (cervicofacial hemangiomas) can indicate serious issues. These vascular malformations may signal problems with brain, heart, or eye development.

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Area of Science:

  • Vascular Malformations
  • Pediatric Medicine
  • Genetics

Background:

  • Large, segmental cervicofacial hemangiomas are rare but significant vascular anomalies.
  • These lesions can present complex diagnostic and management challenges.
  • Associated anomalies can impact multiple organ systems, necessitating a multidisciplinary approach.

Purpose of the Study:

  • To investigate the spectrum of anomalies associated with large, segmental cervicofacial hemangiomas.
  • To highlight the importance of comprehensive evaluation in patients with these vascular malformations.
  • To improve understanding of the clinical implications and management strategies.

Main Methods:

  • Retrospective chart review of patients diagnosed with large, segmental cervicofacial hemangiomas.
  • Detailed analysis of imaging studies (MRI, CT) for intracranial and cardiovascular anomalies.
  • Ophthalmic examinations and assessment of ventral development.

Main Results:

  • A significant proportion of patients exhibited associated intracranial anomalies.
  • Cardiovascular and ophthalmic system abnormalities were frequently observed.
  • Ventral developmental issues were noted in a subset of the patient cohort.

Conclusions:

  • Large, segmental cervicofacial hemangiomas warrant thorough investigation for associated systemic anomalies.
  • Early identification and management of these comorbidities are crucial for optimal patient outcomes.
  • Multidisciplinary care is essential for addressing the complex needs of affected individuals.