Skip to main content

Table 1 Cardiac function at baseline and after 20 minutes exposure to hypoxic stimulus

From: Circulating N-terminal brain natriuretic peptide and cardiac function in response to acute systemic hypoxia in healthy humans

  Baseline Hypoxia
Cardiac output (L/min) 6.0 ± 1.2 8.1 ± 1.6***
Ejection fraction (%) 67 ± 4 75 ± 6***
RV ED diameter (mm) 25 ± 4 26 ± 3
RA diameter (mm) 20 ± 4 19 ± 2
LA diameter (mm) 39 ± 4 38 ± 3
PA blood flow velocity (m/s) 0.8 ± 0.1 1.0 ± 0.1*
Vena cava inferior (mm) 16.8 ± 4.6 15.2 ± 4.2
RV-to-RA pressure gradient (mmHg) 28 ± 5 31 ± 3*
RV E’/ A’ (cm/s) 1.5 ± 0.4 1.4 ± 0.2
RV Sm (cm/s) 0.20 ± 0.04 0.24 ± 0.04*
Pulmonary vein s/d ratio 1.3 ± 0.2 1.4 ± 0.3
TAPSE (cm) 2.6 ± 0.2 3.0 ± 0.3**
LAD diameter (cm) 5.62 ± 0.64 5.60 ± 0.64
LAD blood flow velocity (m/s) 0.16 ± 0.4 0.28 ± 0.07**
LV lateral wall E’/A’ 1.9 ± 0.7 1.5 ± 0.6
LV septal wall E’/A’ 1.6 ± 0.3 1.5 ± 0.3
LV septum Sm (cm/s) 0.12 ± 0.02 0.15 ± 0.05
LV lateral wall Sm (cm/s) 0.16 ± 0.06 0.19 ± 0.06
Lateral mitral annular displacement (cm) 1.5 ± 0.2 1.8 ± 0.2**
Septal mitral annular displacement (cm) 1.5 ± 0.1 1.7 ± 0.3*
E/A –ratio 1.6 ± 0.3 1.4 ± 0.2*
  1. LV = left ventricle, RV = Right ventricle, LA = left atrium , RA = right atrium, TAPSE = Tricuspid annular plane systolic excursion, PA = pulmonary artery, E’ = tissue-Doppler early diastolic velocity, A’ = tissue-Doppler late diastolic velocity, Sm = tissue-Doppler systolic velocity, E = Mitral inflow early peak velocity, A = Mitral inflow atrial peak velocity. *p < 0.05, **p < 0.01, ***p < 0.001 compared to baseline. LAD = the left anterior descending coronary artery.