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Research Studies:

• Local Vasoconstriction and Sympathoexcitation in POTS
   

• Vascular Dysfunction in CFS
   

• Endothelial Cell Dysfunction in Chronic Renal Failure
   

• Postural Hyperpnea inPOTS
   

• Irritable Bowel Syndrome and Autonomic Dysfunction
   

• Microvascular Dysfunction in Obese Adolescents
  

Circulatory Measurements

• HR, BP

• Muscle Pump

• SPG

• IPG

• LDF

  • Microdialysis

• TCD

• Dye Dilution CO and BV

• Findings in POTS

Orthostatic Stress  Testing & instrumentation

Circulatory Autonomic Testing

Lay Review with glossary

Orthostatic Intolerance (OI)

• Physiology 

• Patterns of  OI

  • Normal

  • Vasovagal syncope

  • POTS

  • Dysautonomic

• Acute OI and  syncope

  • Splanchnic pooling

• Chronic OI

  • POTS and Chronic OI

  • Chronic Fatigue Syndrome

  • Circulatory Findings in POTS

Circulatory Findings in POTS

Orthostatic Hypotension

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[ Up ] [ Peripheral Vascular Properties Measured by Strain Gauge Plethysmography (SPG) ] [ Laser Doppler Flowmetry (LDF) ] [ Heart Rate and Blood Pressure ] [ Transcranial Doppler Ultrasound (TCD) ] [ Impedance Plethysmography (IPG) ] [ Skeletal Muscle Pump ]

   Contents: 

• Measurement of HR, BP
   
• Measurement of skeletal muscle pump activity
   
• Measurements of arterial flow and resistance, venous pressure (Pv), capacitance, microvascular filtration and venous resistance
           using venous occlusion strain gauge plethysmography  
   
• Blood Volume Distribution and Segmental Blood Flow by impedance plethysmography
   
• Measurement of Cutaneous Blood Flow with Laser-Doppler Flowmetry
  • A potent combination: Laser-Doppler Flowmetry and Intradermal Microdialysis
     
• Measuring Cerebral Blood Flow Velocity by Transcranial Doppler Sonography
   
• Measuring Systemic Cardiac Output and Blood Volume by  Indicator Dilution Technique (Indocyanine Green Dye and Daxor tagged albumin)
   
• Findings in POTS

 

 

Future directions

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Continuous measurement of blood pressure, electrocardiography, and respiration