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Related Concept Videos

Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
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Disorders of the Autonomic Nervous System01:18

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The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
Raynaud's disease, also known as Raynaud's...
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Alterations in Blood Pressure01:30

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Alterations in blood pressure, such as hypertension (high blood pressure) and hypotension (low blood pressure), significantly affect human health. Understanding these conditions' classifications, causes, and symptoms is essential for effective management and treatment.
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart...
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Blood Pressure Imbalances and Circulatory Shock01:24

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Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
Blood Pressure: Hypertension and Hypotension
Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
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Narcolepsy01:07

Narcolepsy

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Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.
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Updated: Jul 28, 2025

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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An Unexpected Cause of Syncope.

Melisa Esposito1, Sulagna Das2, Yulith Roca Alvarez2

  • 1Internal Medicine, Kettering Health, Dayton, USA.

Cureus
|May 30, 2023
PubMed
Summary
This summary is machine-generated.

Retroperitoneal liposarcomas can present with syncope, a rare cause of fainting. A thorough physical exam is crucial for diagnosing these challenging tumors, even with nonspecific symptoms.

Keywords:
dedifferentiated lipoliposarcomapainless palpable massretroperitoneal liposarcomasoft tissue sarcomasyncope

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Area of Science:

  • Oncology
  • Emergency Medicine
  • Diagnostic Radiology

Background:

  • Syncope is a frequent emergency department complaint with diverse etiologies.
  • Retroperitoneal liposarcomas (RLS) are rare tumors with nonspecific presentations, posing diagnostic challenges.
  • Early diagnosis of RLS is critical for effective treatment and improved patient outcomes.

Observation:

  • A patient presented to the emergency department with syncope as the sole chief complaint.
  • The patient was diagnosed with retroperitoneal liposarcomas (RLS).
  • The RLS diagnosis was facilitated by unexpected physical examination findings.

Findings:

  • Retroperitoneal liposarcomas can manifest as syncope, mimicking common causes of fainting.
  • A comprehensive physical examination identified key findings leading to the RLS diagnosis.
  • Diagnostic work-up, prompted by physical exam, confirmed the presence of RLS.

Implications:

  • This case underscores the importance of a detailed physical examination in the emergency department, irrespective of the initial complaint.
  • It highlights the potential for rare retroperitoneal tumors to present with common symptoms like syncope.
  • Early detection through thorough evaluation allows for timely surgical intervention and management of RLS.