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Posts Tagged ‘pulmonary artery’

What is the anatomical relationship between pulmonary artery and pulmonary veins ?

Posted in cardiology-Anatomy, Infrequently asked questions in cardiology (iFAQs), tagged , on October 6, 2008| Leave a Comment »

               Usually in the the vascular  system both artery and  vein  go together .It is an  irony in pulmonary circualtion  these two never go together .Another paradox is that pulmonary artery carries the most deoxygenated  blood and pulmonary vien carries the purest  form of blood in the entrie body , probably God has kept them widely seperated as  communication between them  seriously affect the physiology.

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What is the difference between left ventricular pressure curve and right ventricular pressure curve ?

Posted in Hemodynamics, Tutorial in clinical cardiology, tagged , , , , , , , , , , on September 18, 2008| 2 Comments »

The pressure tracing between two chambers of the heart are distinctly different .

 Apart from the magnitude of the  pressure ,(LV at systemic pressure ) The morphology also changes.

  •  RV pressure curve is triangular in shape,
  •  Upstroke is not rapid , (Low dp/dt)
  •  There is no sustained peak ,
  •  There is an early fall and
  •  The pressure falls to zero which  never happens in LV.

Contary to this LV pressure curve is bullet shaped,  with a rapid upstroke, sustained peak, fall later, and does not touch zero.

RV/LV pressure curves in normal persons .Adapted from , Curtiss 1975 Circulation

Note : The shapes of RV curve will change in pathological states.Example in TOF, large VSD there will be left ventricularisation of RV pressure wave forms. Also  in pulmonary hypertension RV pressure may mimic a LV curve.

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