Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Computerized analysis of equilibrium radionuclide ventriculography time-activity curve in the assessment of left ventricular performance: comparison of two methods (1985)
    Springer
    European journal of nuclear medicine 10 (1985), S. 198-202 
    Details
    ISSN: 1619-7089
    Keywords: Time-activity curve ; peak filling rate ; filling fraction ; Fourier analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two methods for the analysis of left ventricle time-activity curve (TAC) of equilibrium gated ventriculography were compared in three groups of subjects [8 controls, 13 patients with coronary artery disease (CAD), 11 patients with myocardial infarction (MI). The first method was based on third-degree polynomial fitting, the second on Fourier analysis. The following parameters were calculated: peak ejection rate (PER), peak filling rate (PFR), time to PER and PFR, and filling fraction at the first third of diastole. A preliminary study of changing values of PER and PFR and of the mean error with increasing number of harmonics summed in order to obtain the best fitting of TAC demonstrated that beyond the sum of the first four harmonics there was no further significant improvement. The advantages of Fourier analysis are as follows: 1) it is independent of the operator and fits only one function to the whole cardiac cycle; 2) it requires less computer time; 3) it provides better differentiation between controls and CAD patients. All of the 13 CAD patients had abnormal PFR on Fourier analysis, only 9 on polynomial analysis. At rest, 9 of the CAD patients had wall motion abnormalities, while only two had an abnormal ejection fraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254461
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Radionuclide assessment of right-ventricular involvement in inferior acute myocardial infarction: clinical correlations and in-hospital follow-up (1985)
    Springer
    European journal of nuclear medicine 10 (1985), S. 235-240 
    Details
    ISSN: 1619-7089
    Keywords: Inferior acute myocardial infarction ; Right ventricular involvement ; Equilibrium gated radionuclide angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We studied 33 patients (28 males, 5 females) with first inferior acute myocardial infarction (AMI) and 12 normal volunteers. They underwent first-pass (FP) and equilibrium-gated radionuclide angiography (EGRA) within 4 days of the onset of symptoms. The parameters [ejection fraction (EF), peak ejection rate (PER), peak filling rate (PFR)] of the time-activity curve (TAC) of both ventricles [left ventricle (LV), right ventricle (RV)] were computed. The regional wall motion (RWM) was evaluated by parametric images (amplitude and phase). In 43% of the patients with AMI, we found a depressed RVEF, while the LVEF was decreased in only 33%. The sensitivity of diastolic parameters was shown to be clearly superior to that of the systolic parameters (RVPFR, 78%; LVPFR, 79%). The abnormalities of the overall performance of both ventricles were significantly correlated with those of the RWM. The abnormal RVEF allwed us to assess the necrotic involvement of the RV, while a depressed RVPFR suggested an impaired RV compliance mostly on an ischemic basis. Congestive heart failure (CHF) and shock syndrome were significantly correlated with depressed RV parameters, while the LVEF, despite RWM abnormalities, was in the normal range. EGRA with computation of the TAC parameters of both ventricles appeared to be useful for in-hospital prognostic evaluation, therapeutic planning and clinical follow-up of patients with inferior myocardial infarction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254467
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Prinzmetal's variant angina evolved in inferior myocardial infarction with involvement of the right ventricle: Sequential radionuclide evaluation (1985)
    Springer
    European journal of nuclear medicine 11 (1985), S. 279-282 
    Details
    ISSN: 1619-7089
    Keywords: Variant angina ; Equilibrium gated radionuclide angiography ; Right ventricle infarction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A patient with Prinzmetal's variant angina (PVA) who developed an inferolateral myocardial infarction with right-ventricle involvement was studied using sequential radionuclide imaging until 5 months after the acute event. The patient also underwent-contrast ventriculography and coronary-artery angiography. Equilibrium-gated radionuclide angiography (EGRA) revealed the localization of ventricular dysfunction, the results obtained being in agreement with haemodynamic data. We emphasize the usefulness of the parameters obtained using EGRA (regional wall motion, systolic and diastolic parameters) in planning therapy and follow-up.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00279084
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Comparative quantitative evaluation of hepatic clearance of diethyl-IDA and para-butyl-IDA in jaundiced and non-jaundiced patients (1981)
    Springer
    European journal of nuclear medicine 6 (1981), S. 539-543 
    Details
    ISSN: 1619-7089
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A method for comparative measurement of hepatic clearance of different hepatobiliary agents is described and the clinical use of diethyl-IDA and parabutyl-IDA is discussed. The study was performed with both radiopharmaceuticals in 13 patients with hepatobiliary disease with serum bilirubin ranging from 0.3 to 16.4 mg/100 ml. Diethyl-IDA is preferable for a qualitative evaluation of hepatobiliary disease, because of its higher hepatic clearance and faster biliary excretion rate. Parabutyl-IDA is superior for measuring the hepatocytic uptake function, due to the low urinary excretion and the absence of an apparent re-entry from liver to plasma, even in patients with obstructive jaundice. In contrast, an appreciable re-entry can be demonstrated for diethyl-IDA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00252666
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Clinical value of phase and amplitude images and left ventricle time-activity curves in assessing patients with acute myocardial infarction (1984)
    Springer
    European journal of nuclear medicine 9 (1984), S. 6-11 
    Details
    ISSN: 1619-7089
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The purpose of this study was to assess the clinical usefulness of phase and amplitude images and of the left ventricle time-activity curve (LVTAC) obtained by equilibrium gated radionuclide ventriculography (EGRV) in patients with acute myocardial infarction (AMI). Fifty-six patients were studied within 4 days of the onset of AMI by EGRV; of these 49 also underwent first-pass (FP) angiocardiography, for comparison with EGRV, and 21 underwent repeated EGRV 3 months after AMI. Phase and amplitude images were obtained by Fourier analysis. LVTAC analysis was performed by a third degree polynomial fitting to determine peak ejection rate (PER) and peak filling rate (PFR). A substantial equivalence of EGRV and FP methods was demonstrated, as regards left ventricle ejection fraction (LVEF), while a sharp superiority of EGRV with Fourier analysis was shown with regard to the sensitivity of RWM abnormality detection. With only one exception all the cases showed RWM abnormalities, while LVEF was normal in 21 of 27 patients with less than three affected segments. The most sensitive global function index was the LVPFR. In the acute phase regional dyskinesis was observed in 14 of 56 patients. About 40% of our cases showed an improvement of the kinetic abnormalities 3 months after AMI. The highest rate of improvement was observed in the group with ECG patterns of limited infarction and with normal LVEF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254342
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...