FOUNDATIONS
CO = SV X HR
What equation links HR, SV and CO?
Which waveforms has a dicrotic notch.
Pulmonary artery waveform
TRANSDUCER IS BELOW PHLEBOSTATIC AXIS, WHAT HAPPENED
Pressure reads falsely high.
Low CI, high wedge, suggest what broad phenotype?
LV failure, cardiogenic shock.
What is the recommended balloon inflation volume
1.5 mL
HR 120, but CI is 1.7, what concept matters?
Tachycardia does not guarantee forward flow, SV can be low.
RV pressure is mistaken for PA. What key feature is missing.
PA has a dicrotic notch and higher diastolic pressure than RV
Waveform is sluggish and flattened. What is the likely problem?
Overdamping, inspect system for air, clot, make sure connections are not locked.
High CVP, relatively low wedge, low CI, suggest what?
RV failure
What is pulmonary artery rupture?
This potentially fatal complication may present with hemoptysis after catheter wedging.
What 3 determinants influence SV?
Preload, afterload and contractility
PAWP suddenly looks bizarre, what should you do?
Deflate the balloon and troubleshoot, verify waveform and catheter position.
Pt is turned and all pressures change. What should be verified?
Transducer is level, zero, pt position and clinical condition.
Low CI, falling SVO2, why concerning?
Reduced oxygen delivery. Evaluate flow and oxygen content.
What is a spontaneous wedge waveform?
This sudden waveform change may indicate the catheter has migrated too far into the pulmonary artery.
What is pulmonary artery rupture?
This potentially fatal complication may present with hemoptysis after catheter wedging.