VENOUS WAVEFORMS

chronic lung disease diagram

• Elevated “a” wave: occurs when there is an opposing resistance as RA empties in to RV due to-
   pulmonary hypertension
   tricuspid stenosis
   RA mass or thrombus
• Cannon “a” wave: prominent venous pulse occurs when RA contracts against a close tricuspid valve due to-
   premature atrial contraction in-
      premature atrial/ junctional/ ventricular beats
   AV dissociation in-
      complete AV block
      ventricular tachycardia
• Absent “a” wave: occurs when RA doesn’t forcefully contract due to-
   atrial fibrillation
• Elevated “x” wave (Friedrich’s sign): occurs when RA can’t fully relax due to-
   constrictive pericarditis
• Elevated “v” wave: occurs when the RV contracts but blood regurges back to RA & increases RA pressure in-
   tricuspid regurgitation
• Kussmaul’s sign: neck veins rise during inspiration due to-
   tamponade
   right heart failure
   acute RVMI



cannon a waves

• Elevated “a” wave: occurs when there is an opposing resistance as RA empties in to RV due to-
   pulmonary hypertension
   tricuspid stenosis
   RA mass or thrombus
• Cannon “a” wave: prominent venous pulse occurs when RA contracts against a close tricuspid valve due to-
   premature atrial contraction in-
      premature atrial/ junctional/ ventricular beats
   AV dissociation in-
      complete AV block
      ventricular tachycardia

giant c-v waves

• Elevated “v” wave: occurs when the RV contracts but blood regurges back to RA & increases RA pressure in-
   tricuspid regurgitation

kussmaul's sign

• Elevated “x” wave (Friedrich’s sign): occurs when RA can’t fully relax due to-
   constrictive pericarditis
• Kussmaul’s sign: neck veins rise during inspiration due to-
   tamponade
   right heart failure
   acute RVMI

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