scholarly journals Correlation between caudal pulmonary artery diameter to body surface area ratio and echocardiography-estimated systolic pulmonary arterial pressure in dogs

2016 ◽  
Vol 17 (2) ◽  
pp. 243 ◽  
Author(s):  
Youngjae Lee ◽  
Wooshin Choi ◽  
Donghoon Lee ◽  
Jinhwa Chang ◽  
Ji-Houn Kang ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Arterial Pressure ◽  
Surface Area ◽  
Body Surface ◽  
Pulmonary Arterial Pressure ◽  
Area Ratio ◽  
Surface Area Ratio ◽  
Systolic Pulmonary Arterial Pressure ◽  
Pulmonary Arterial ◽  
Pulmonary Artery Diameter

MO746CARDIAC REMODELING AND PULMONARY HYPERTENSION IN HEMODIALYSIS PATIENTS

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Ekaterina Borodulina ◽  
Alexander M Shutov
Keyword(s):  
Pulmonary Hypertension ◽  
Left Ventricular Hypertrophy ◽  
Arterial Pressure ◽  
Ventricular Hypertrophy ◽  
Pulmonary Arterial Pressure ◽  
Hemodialysis Patients ◽  
Left Ventricular ◽  
Hemodialysis Treatment ◽  
Systolic Pulmonary Arterial Pressure ◽  
Pulmonary Arterial

Abstract Background and Aims An important predictor of cardiovascular mortality and morbidity in hemodialysis patients is left ventricular hypertrophy. Also, pulmonary hypertension is a risk factor for mortality and cardiovascular events in hemodialysis patients. The aim of this study was to investigate cardiac remodeling and the dynamics of pulmonary arterial pressure during a year-long hemodialysis treatment and to evaluate relationship between pulmonary arterial pressure and blood flow in arteriovenous fistula. Method Hemodialysis patients (n=88; 42 males, 46 females, mean age was 51.7±13.0 years) were studied. Echocardiography and Doppler echocardiography were performed in the beginning of hemodialysis treatment and after a year. Echocardiographic evaluation was carried out on the day after dialysis. Left ventricular mass index (LVMI) was calculated. Left ventricular ejection fraction (LVEF) was measured by the echocardiographic Simpson method. Arteriovenous fistula flow was determined by Doppler echocardiography. Pulmonary hypertension was diagnosed according to criteria of Guidelines for the diagnosis and treatment of pulmonary hypertension of the European Society of Cardiology. Results Pulmonary hypertension was diagnosed in 47 (53.4%) patients. Left ventricular hypertrophy was revealed in 71 (80.7%) patients. Only 2 (2.3%) patients had LVEF<50%. At the beginning of hemodialysis correlation was detected between systolic pulmonary arterial pressure and LVMI (r=0.52; P<0.001). Systolic pulmonary arterial pressure negatively correlated with left ventricular ejection fraction (r=-0.20; P=0.04). After a year of hemodialysis treatment LVMI decreased from 140.49±42.95 to 123.25±39.27 g/m2 (р=0.006) mainly due to a decrease in left ventricular end-diastolic dimension (from 50.23±6.48 to 45.13±5.24 mm, p=0.04) and systolic pulmonary arterial pressure decreased from 44.83±14.53 to 39.14±10.29 mmHg (р=0.002). Correlation wasn’t found between systolic pulmonary arterial pressure and arteriovenous fistula flow (r=0.17; p=0.4). Conclusion Pulmonary hypertension was diagnosed in half of patients at the beginning of hemodialysis treatment. Pulmonary hypertension in hemodialysis patients was associated with left ventricular hypertrophy, systolic left ventricular dysfunction. After a year-long hemodialysis treatment, a regress in left ventricular hypertrophy and a partial decrease in pulmonary arterial pressure were observed. There wasn’t correlation between arteriovenous fistula flow and systolic pulmonary arterial pressure.

Clinical implication of renal allograft volume to recipient body surface area ratio in pediatric renal transplant

2018 ◽  
Vol 22 (8) ◽  
pp. e13295
Author(s):  
Michael E. Chua ◽  
Jin Kyu Kim ◽  
Michele Gnech ◽  
Jessica M. Ming ◽  
Bisma Amir ◽  
...  
Keyword(s):  
Renal Transplant ◽  
Surface Area ◽  
Body Surface Area ◽  
Body Surface ◽  
Clinical Implication ◽  
Renal Allograft ◽  
Area Ratio ◽  
Surface Area Ratio ◽  
Pediatric Renal Transplant

Effect of hypoxia on pulmonary artery pressure of dogs

1964 ◽  
Vol 207 (6) ◽  
pp. 1314-1318 ◽  
Author(s):  
Benson R. Wilcox ◽  
W. Gerald Austen ◽  
Harvey W. Bender
Keyword(s):  
Pulmonary Artery ◽  
Arterial Pressure ◽  
Pulmonary Artery Pressure ◽  
Pulmonary Arterial Pressure ◽  
Venous Pressure ◽  
Artery Pressure ◽  
Pulmonary Vasoconstriction ◽  
Systemic Hypoxia ◽  
Pump Output ◽  
Pulmonary Arterial

The mechanism by which the pulmonary artery pressure rises in response to hypoxia has never been clearly demonstrated. This problem was reinvestigated in experiments utilizing separate pulmonary and systemic perfusion systems. These vascular beds were perfused in such a fashion that a change in pulmonary artery pressure could only result from changes in vasomotor tone. Alveolar-pulmonary vein hypoxia was usually associated with a slight fall in pulmonary artery pressure. Systemic hypoxia resulted in elevation of pulmonary arterial pressure in 10 of the 12 animals tested with a constant-flow and constant-pulmonary venous pressure. In addition, all animals with systemic desaturation showed an increased venous return. When the "cardiac output" (pump output) was increased to match this return, the elevation in pulmonary artery pressure increased. It was concluded that the pulmonary arterial pressure elevation seen with hypoxia is the result of active pulmonary vasoconstriction coupled with an increased pulmonary blood flow.

scholarly journals P1261DIAGNOSTIC VALUE OF TEMPORARY OCCLUSION OF ARTERIO-VENOUS HIGH FLOW FISTULA DURING RIGHT HEART CATHETERISATION IN PATIENTS WITH PULMONARY HYPERTENSION

2020 ◽  
Vol 35 (Supplement_3) ◽  
Author(s):  
Eugene Zeltyn-Abramov ◽  
RUSTAM ISKHAKOV ◽  
NATALYA BELAVINA ◽  
NATALIYA KLOCHKOVA ◽  
NADIA FROLOVA
Keyword(s):  
Arterial Pressure ◽  
Pulmonary Arterial Pressure ◽  
High Flow ◽  
Right Atrial ◽  
Volume Index ◽  
Atrial Volume ◽  
Right Heart ◽  
Systolic Pulmonary Arterial Pressure ◽  
Pulmonary Arterial

Abstract Background and Aims Pulmonary hypertension (PH) is prevalent in patients with functioning high-flow arterio-venous fistula (HFAVF) and associated with congestive heart failure (CHF). The real incidence and possible causes of this phenomenon is a matter of debate. Hemodynamic effects of HFAVF is considering as one of the reasons for PH formation. The subject of study was the impact of HFAVF on selected parameters of central hemodynamics. In particular, the diagnostic relevance of test of temporary HFAVF occlusion (TTO) was evaluated during right heart catheterization (RHC). Method A total of 13 patients were enrolled: 8 - after kidney transplantation (KT) with preserved allograft function and 5 - on maintenance hemodialysis (HD). All of them demonstrated clinical presentation of CHF III-IV class (NYHA). Severe PH and diastolic disfunction (DD) were observed at a baseline: echocardiographic systolic pulmonary arterial pressure sPAP (mmHg): M=59 (SD 13), ratio of mitral early diastolic inflow velocity (E) (pulsed wave Doppler) to average of septal and lateral mitral annular early-diastolic peak velocity (e′) (tissue Doppler imaging) E/e′ M=18 (SD 5). The ones who have comorbid conditions that cause PH were excluded. All patients bore an upper arm HFAVF, flow of the AVF (Qa) measured by Doppler ultrasonography was markedly high (Qa): M = 3,8 l/min (SD 1,2), the cardio-pulmonary recirculation (Qa/CO): M = 51% (SD 13). All patients underwent RHC and TTO AVF. Echocardiography (Echo) was performed initially and on the follow up (8 weeks after AVF closure/flow reduction). Statistical analysis was performed using the STATISTICA 13 software (Wilcoxon, T-test). Results The results of RHC and Echo data are presented in tables 1, 2. As can be seen from the table data, all cases demonstrated instrumental features of high output CHF (HO CHF) in accordance with patient’s clinical status. TTO of HFAVF resulted in statistically significant decrease in CO and CI values, but no changes in PAP parameters were observed. Taking into account clinical and instrumental features of advanced CHF, HF AVF was closed in 8 patients after KT and in 2 patients on HD. 3 patients on HD underwent AVF flow reduction up to Qa not exceeding 1,1 l/min. Follow-up demonstrated complete resolution of CHF and dramatic improvement of DD, reduction in CO, CI, sPAP, volume parameters. CO, cardiac output; CI, cardiac index; sPAP, systolic pulmonary arterial pressure; meanPAP, mean pulmonary arterial pressure; RAP, mean right atrial pressure; PCWP, pulmonary capillary wedge pressure; LV EDVi, left ventricular end-diastolic volume index; LAVi, left atrial volume index; RAVi, right atrial volume index; Conclusion PH is a component of AVF-induced HO CHF and could be classified as postcapillary one. TTO confirms significant HFAVF contribution to specific changes of parameters of central hemodynamics due to HO CHF. TTO does not impact on PAP values and therefore is not valid to clarify PH genesis per se.

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