MS385 CORONARY CIRCULATION AND LEFT VENTRICULAR FUNCTION: EFFECT OF REVASCULARIZATION IN PATIENTS WITH PRESERVED LEFT VENTRICLE SYSTOLIC FUNCTION

2010 ◽  
Vol 11 (2) ◽  
pp. 187-188
Author(s):  
O. Kuryata ◽  
Y. Yegorova
Keyword(s):  
Left Ventricle ◽  
Left Ventricular Function ◽  
Ventricular Function ◽  
Coronary Circulation ◽  
Systolic Function ◽  
Left Ventricular ◽  
Left Ventricle Systolic Function

INFLUENCE OF ACIDEMIA ON LEFT VENTRICULAR FUNCTION IN THE NEWBORN LAMB

PEDIATRICS ◽  
1966 ◽  
Vol 38 (3) ◽  
pp. 457-464
Author(s):  
Norman S. Talner ◽  
Thomas H. Gardner ◽  
S. Evans Downing
Keyword(s):  
Left Ventricle ◽  
Left Ventricular Function ◽  
Ventricular Function ◽  
Diastolic Pressure ◽  
Aortic Pressure ◽  
Left Ventricular ◽  
Newborn Lamb ◽  
Precise Control ◽  
Significant Impairment ◽  
Ph Range

The performance of the left ventricle in 20 newborn lambs was examined in a preparation which allowed precise control of aortic pressure, cardiac output, heart rate, and temperature. Reduction of arterial pH from a normal range (7.35 to 7.5) to severe acidemia (6.8 to 7.0) by hydrochloric or lactic acid infusion resulted in no significant impairment of left ventricular function. Prolonged acidemia (over 2 hours) failed to produce a reduction in left ventricular stroke volume or mean ejection rate for a given left ventricular end-diastolic pressure. Responsiveness of the left ventricle of the lamb to catecholamine stimulation was not diminished over the pH range 7.5 to 6.8. Under conditions of these investigations the apparent resistance of the myocardium of the newborn lamb, as well as the adult cat, to wide variations in pH may reflect a buffering capacity of cardiac muscle which would allow minimal change in intracellular pH, even though extracellular pH may indicate the presence of severe metabolic acidosis.

scholarly journals Impact of parathyroidectomy on left ventricular function in end stage renal disease patients

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Shaohua Chen ◽  
Kaixiang Sheng ◽  
Ying Shen ◽  
Hua Jiang ◽  
Xin Lei ◽  
...  
Keyword(s):  
Left Ventricular Function ◽  
Ventricular Function ◽  
End Stage Renal Disease ◽  
Systolic Function ◽  
Left Ventricular Systolic Function ◽  
Left Ventricular ◽  
Ventricular Systolic Function ◽  
Stage Renal Disease ◽  
End Stage ◽  
Esrd Patients

Abstract Background Secondary hyperparathyroidism (SHPT) is a common complication in end-stage renal disease (ESRD) patients, and parathyroidectomy (PTX) is an effective treatment intervention of SHPT. However, the curative impact of PTX on left ventricular function still remains incompletely understood. To evaluate the impact of parathyroidectomy on left ventricular function in ESRD patients, we conducted this retrospective study. Methods Between Oct 1, 2010 and Oct 1, 2016, ESRD patients presented with SHPT who underwent parathyroidectomy were enrolled. We retrospectively collected the ultrasonic cardiogram parameter pre- and 1-year post-PTX, and analyzed the influence factor for the overturn of left ventricular hypertrophy (LVH) and the improvement of ejection fraction% (EF%). Results In all the patients (135), the main ultrasonic cardiogram parameter dramatically improved after PTX. Compared with pre-PTX, the left ventricular mass (LVM) (172.82 (135.90, 212.91) g vs. 192.76 (157.56, 237.97) g, p<0.001) and the left ventricular mass index (LVMI) (107.01 (86.79, 128.42) g/m2 vs. 123.54 (105.49, 146.64) g/m2, p<0.001) significantly declined after 1 year of the PTX. Further, 43.75% patients diagnosed with LVH before the PTX have recovered from LVH. In the subgroup analysis of 35 patients with EF% ≤ 60% pre-PTX, EF% and fractional shortening% (FS%) significantly improved after 1 year of the PTX compared with pre-PTX (EF%: 64.90 ± 7.90% vs. 55.71 ± 4.78%, p<0.001; FS% 35.48 ± 6.34% vs. 29.54 ± 2.88%, p<0.001), and 82.86% patients underwent an improvement of left ventricular systolic function post 1year of the PTX. Conclusions tPTX+AT is an effective curative intervention of secondary hyperparathyroidism and can significantly overturn the LVH and increase the left ventricular systolic function.

scholarly journals Environmentally persistent free radicals decrease cardiac function and increase pulmonary artery pressure

2012 ◽  
Vol 303 (9) ◽  
pp. H1135-H1142 ◽  
Author(s):  
Sarah Mahne ◽  
Gin C. Chuang ◽  
Edward Pankey ◽  
Lucy Kiruri ◽  
Philip J. Kadowitz ◽  
...  
Keyword(s):  
Free Radicals ◽  
Left Ventricle ◽  
Cardiac Function ◽  
Left Ventricular Function ◽  
Ventricular Function ◽  
Diastolic Pressure ◽  
Silica Particles ◽  
Left Ventricular ◽  
Heme Oxygenase 1 ◽  
Stroke Work

Epidemiological studies have consistently linked inhalation of particulate matter (PM) to increased cardiac morbidity and mortality, especially in at risk populations. However, few studies have examined the effect of PM on baseline cardiac function in otherwise healthy individuals. In addition, airborne PM contain environmentally persistent free radicals (EPFR) capable of redox cycling in biological systems. The purpose of this study was to determine whether nose-only inhalation of EPFRs (20 min/day for 7 days) could decrease baseline left ventricular function in healthy male Sprague-Dawley rats. The model EPFR tested was 1,2-dichlorobenzene chemisorbed to 0.2-μm-diameter silica/CuO particles at 230°C (DCB230). Inhalation of vehicle or silica particles served as controls. Twenty-four hours after the last exposure, rats were anesthetized (isoflurane) and ventilated (3 l/min), and left ventricular function was assessed using pressure-volume catheters. Compared with controls, inhalation of DCB230 significantly decreased baseline stroke volume, cardiac output, and stroke work. End-diastolic volume and end-diastolic pressure were also significantly reduced; however, ventricular contractility and relaxation were not changed. DCB230 also significantly increased pulmonary arterial pressure and produced hyperplasia in small pulmonary arteries. Plasma levels of C-reactive protein were significantly increased by exposure to DCB230, as were levels of heme oxygenase-1 and SOD2 in the left ventricle. Together, these data show that inhalation of EPFRs, but not silica particles, decreases baseline cardiac function in healthy rats by decreasing cardiac filling, secondary to increased pulmonary resistance. These EPFRs also produced systemic inflammation and increased oxidative stress markers in the left ventricle.

Left ventricular function in adolescents and adults with restrictive ventricular septal defect and moderate left-to-right shunting

2000 ◽  
Vol 10 (2) ◽  
pp. 126-129 ◽  
Author(s):  
Alan G. Magee ◽  
Lynn Fenn ◽  
Joric Vellekoop ◽  
Michael J. Godman
Keyword(s):  
Ventricular Septal Defect ◽  
Left Ventricular Function ◽  
Ventricular Function ◽  
Septal Defect ◽  
Systolic Function ◽  
Adult Life ◽  
Left Ventricular ◽  
Ventricular Septal Defects ◽  
Septal Defects ◽  
Significant Difference

AbstractBackgroundThe long-term haemodynamic effects of a restrictive ventricular septal defect permitting moderate left-to-right shunting are not known.Patients and methodsEchocardiographic measure ments of left heart dimensions and function were compared between a group of 9 older children and adults (median age 21 years, range 12–24.5 years) having restrictive ventricular septal defects (median Qp/Qs 1.7, range 1.4–2.1) and a group of 10 age matched controls.ResultsLeft ventricular mass indexed to body surface area was significantly greater in subjects than in controls (102±29 vs. 75±13 g/m2, p=0.02), although there was no significant difference in the ratio of mass to volume. There were no significant differ ences between indexes of left ventricular systolic function. Ratios of peak early to late diastolic ventricular filling were lower in those with septal defects (1.5±0.3 vs. 1.8±0.3, p=0.013), but there were no differences in other indexes of diastolic function.ConclusionsResting left ventricular function does not appear to have deteriorated by early adult life in patients with restrictive ventricular septal defects and moderate volume loading. This would support a continued conservative approach to management in these patients.

Beneficial effect of β-adrenergic blockade on left ventricular function in haemodialysis patients

2001 ◽  
Vol 101 (3) ◽  
pp. 219-225 ◽  
Author(s):  
Yuji HARA ◽  
Mareomi HAMADA ◽  
Yuji SHIGEMATSU ◽  
Bonpei MURAKAMI ◽  
Kunio HIWADA
Keyword(s):  
Left Ventricle ◽  
Atrial Natriuretic Peptide ◽  
Left Ventricular Function ◽  
Ventricular Function ◽  
Natriuretic Peptide ◽  
Plasma Levels ◽  
Left Ventricular ◽  
Β Blocker ◽  
Ventricular Dimension ◽  
Fractional Shortening

Congestive heart failure is a common and serious complication in patients undergoing chronic dialysis. However, there have been no studies on preferential medical therapies to improve left ventricular function in haemodialysis patients. β-Blocker treatment is known to improve left ventricular function in patients with dilated cardiomyopathy; moreover, plasma levels of noradrenaline and natriuretic peptides are sensitive markers of left ventricular dysfunction. The present study investigated whether β-blocker treatment could improve left ventricular function in haemodialysis patients with a dilated left ventricle. Our study group comprised 14 haemodialysis patients with a dilated left ventricle, who had undergone maintenance haemodialysis for a mean of 11 years. The following haemodynamic parameters were evaluated before and after 4 months of treatment with the β-blocker metoprolol: left ventricular dimension at end-systole and end-diastole, and fractional shortening. Plasma levels of noradrenaline, atrial natriuretic peptide and brain natriuretic peptide were also determined. Dry body weight and haemoglobin concentration showed no significant change after compared with before treatment with metoprolol. Heart rate decreased significantly, from 79±9 beats/min to 69±9 beats/min, but systolic blood pressure remained unchanged. The left ventricular dimension both at end-systole and at end-diastole was decreased, and fractional shortening increased significantly. Plasma levels of noradrenaline did not change significantly, but those of atrial natriuretic peptide and brain natriuretic peptide decreased markedly [from 100±89 pg/ml to 46±29 pg/ml (P = 0.0051) and from 549±516 pg/ml to 140±128 pg/ml (P = 0.0035) respectively]. In conclusion, β-blocker therapy with metoprolol can markedly attenuate left ventricular remodelling and decrease the plasma levels of natriuretic peptides in haemodialysis patients with a dilated left ventricle.

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