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Right Heart Catheterization Cheat Sheet: Interpretation of Pressures and Waveforms 
Direct measurements
 ● Central venous pressure
wedge pressure (PCWP ... ● Mixed venous oxyhemoglobin ... x [mean PAp – PCWP ... LVSWI = [MAP – PCWP
Oxyhemoglobin Dissociation Curve 

Left Shift - decreased unloading of O2 at tissue level (i.e.  increased
Oxyhemoglobin Dissociation ... cell anemia #Oxyhemoglobin
IDSA - Prophylaxis to Prevent First Episode of Opportunistic Disease in HIV-AIDS
 • Pneumocystis pneumonia (PCP)
Pneumocystis pneumonia (PCP ... Infections #OIs #HIVAIDS
Pulmonary Arterial Catheterization – Use and Interpretation:
-Pulmonary arterial catheterization (PAC) has never been shown to improve
-mixed venous oxyhemoglobin ... Chambers #Wedge #PCWP
Shock - Differential Diagnosis Framework
MAP = CO x SVR
Hypovolemic (↓ Intravascular volume):
 • Hemorrhage, dehydration due
↓ CO, ↑ SVR, ↓ PCWP ... ↓ CO, ↑ SVR, ↑ PCWP ... ↓ CO, ↑ SVR, ↓ PCWP ... ↑ CO, ↓ SVR, ↓ PCWP
IDSA - Prophylaxis to Prevent First Episode of Opportunistic Disease in HIV-AIDS
 • Pneumocystis pneumonia (PCP)
Pneumocystis pneumonia (PCP ... Infections #OIs #HIVAIDS
CDC Recommended Laboratory HIV Testing Algorithm for Serum or Plasma Specimens

#HIV #Algorithm #Screening #Testing #HIVAIDS #Diagnosis
Screening #Testing #HIVAIDS
Differentiating PAH from PVH - Echocardiography
Pulmonary Artery Hypertension (PAH):
 • RV size - Enlarged
 • LA
Normal/Low • PCWP ... mmHg • PADP-PCWP ... Normal/High • PCWP ... mmHg • PADP-PCWP
Figure 1: Time Course of HIV Detection following Infection

#Diagnosis #InfectiousDiseases #HIVAIDS #Testing #Windows #Screening #Antibody #Detection
InfectiousDiseases #HIVAIDS
Right Heart Catheterization - Pulmonary Artery Pressures and Calculations
PULMONARY VASCULAR RESISTANCE = (meanPAP-PCWP) / CO
 •
RESISTANCE = (meanPAP-PCWP ... based on PVR & PCWP ... RAP/PCWP RATIO ... • A ↑ RA/PCWP correlates ... • RA/PCWP>0.54