1
|
Yang SH, Kim J, Lee TG, Park M, Son HY, Joo CG, Shim JH, Lee Y, Huh YM. Background free in vivo29Si MR imaging with hyperpolarized PEGylated silicon nanoparticles. Analyst 2023; 148:5355-5360. [PMID: 37750298 DOI: 10.1039/d3an01395b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
This study demonstrated the potential of 50 nm PEGylated Si NPs for high-resolution in vivo29Si MR imaging, emphasizing their biocompatibility and water dispersibility. The acquisition of in vivo Si MR images using the lowest reported dose after subcutaneous and intraperitoneal administration opens new avenues for future 29Si MR studies.
Collapse
Affiliation(s)
- Seung-Hyun Yang
- Department of Radiology, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea.
- YUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jiwon Kim
- Department of Bionano Technology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 15588, Republic of Korea.
| | - Tae Geol Lee
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea.
| | - Mirae Park
- Department of Radiology, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea.
| | - Hye Young Son
- Department of Radiology, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea.
- YUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea
| | - Chan Gyu Joo
- Severance Biomedical Science Institute, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jeong Hyun Shim
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea.
| | - Youngbok Lee
- Department of Bionano Technology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 15588, Republic of Korea.
- Department of Applied Chemistry, Hanyang University, Ansan, 15588, Republic of Korea
| | - Yong-Min Huh
- Department of Radiology, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea.
- YUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea
- Department of Biochemistry & Molecular Biology, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea
| |
Collapse
|
2
|
Cao JJ, Nashta NF, Weber J, Bano R, Passick M, Cheng YJ, Schapiro W, Grgas M, Gliganic K. Association of pulmonary transit time by cardiac magnetic resonance with heart failure hospitalization in a large prospective cohort with diverse cardiac conditions. J Cardiovasc Magn Reson 2023; 25:57. [PMID: 37821911 PMCID: PMC10568762 DOI: 10.1186/s12968-023-00963-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 09/13/2023] [Indexed: 10/13/2023] Open
Abstract
BACKGROUND Longer pulmonary transit time (PTT) is closely associated with hemodynamic abnormalities. However, the implications on heart failure (HF) risk have not been investigated broadly in patients with diverse cardiac conditions. In this study we examined the long-term risk of HF hospitalization associated with longer PTT in a large prospective cohort with a broad spectrum of cardiac conditions. METHODS All subjects were prospectively recruited to undergo cardiac magnetic resonance (CMR). The dynamic images of first-pass perfusion were acquired to assess peak-to-peak pulmonary transit time (PTT) which was subsequently normalized to RR interval duration. The risk of HF was examined using Cox proportional hazards models adjusted for baseline confounding risk factors. RESULTS Among 506 consecutively consented patients undergoing clinical cardiac MR with diverse cardiac conditions, the mean age was 63 ± 14 years and 373 (73%) were male. After a mean follow up duration of 4.5 ± 3.0 years, 70 (14%) patients developed hospitalized HF and of these 6 died. A normalized PTT ≥ 8.2 was associated with a significantly increased adjusted HF hazard ratio of 3.69 (95% CI 2.02, 6.73). The HF hazard ratio was 1.26 (95% CI 1.18, 1.33) for each 1 unit increase in PTT which was higher among those preserved (1.70, 95% CI 1.20, 2.41) compared to those with reduced left ventricular ejection fraction (< 50%) (1.18, 95% CI 1.09, 1.27). PTT remained a significant risk factor of hospitalized HF after additional adjustment for N-terminal pro-hormone brain natriuretic peptide (NT-proBNP) or left ventricular global longitudinal strain with additionally demonstrated incremental model improvement through likelihood ratio testing. CONCLUSIONS Our findings support the role of PTT in assessing HF risk among patients with broad spectrum of cardiac conditions with reduced as well as preserved ejection fraction. Longer PTT duration is an incremental risk factor for HF when baseline global longitudinal strain and NT-proBNP are taken into consideration.
Collapse
Affiliation(s)
- J Jane Cao
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA.
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA.
| | - Niloofar Fouladi Nashta
- Sol Price School of Public Policy and Leonard D. Schaeffer Center for Health Policy and Economics, University of Southern California, Los Angeles, CA, USA
| | - Jonathan Weber
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Ruqiyya Bano
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Michael Passick
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Y Joshua Cheng
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - William Schapiro
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA
| | - Marie Grgas
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Kathleen Gliganic
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA
| |
Collapse
|
3
|
Borges RR, Morato TN, Bezerra ASDA, Dias BA, Reinaux JCDF, Monte GU, Farage L. Avaliação de diferentes tempos de trânsito do meio de contraste intravascular em exames de tomografia computadorizada coronariana. Radiol Bras 2022; 55:161-166. [PMID: 35795606 PMCID: PMC9254703 DOI: 10.1590/0100-3984.2021.0063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/08/2021] [Indexed: 11/22/2022] Open
Abstract
Objective To measure the transit times (TTs) of contrast agents among the injection
site (antecubital vein), superior vena cava, pulmonary trunk, and ascending
aorta, in coronary computed tomography angiography (CTA) examinations of
outpatients with no history of cardiovascular or lung disease, thus defining
reference values for those TTs. Materials and Methods The contrast TTs from the injection site (antecubital vein) to the superior
vena cava, from the superior vena cava to the pulmonary trunk, and from the
pulmonary trunk to the ascending aorta were measured by monitoring contrast
enhancement in real time (bolus tracking). Cardiac output was measured by
the geometric method during the CTA examination and was correlated with the
contrast TT. Results Forty-three individuals were analyzed. The mean contrast TT was 13.1 s
overall (from the antecubital vein to the ascending aorta), 3.0 s from the
superior vena cava to the pulmonary trunk, and 7.2 s from the pulmonary
trunk to the ascending aorta. There was a tendency toward a correlation
between contrast TT and cardiac output (p = 0.055). Conclusion The reference values established here for contrast TTs among the superior
vena cava, pulmonary trunk, and ascending aorta will serve as a basis for
clinical evaluation.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Luciano Farage
- Radiolinea Centro de Imagens, Brasil; Universidade de Brasília (UnB), Brasil; Instituto de Cardiologia do Distrito Federal (ICDF), Brasil; Centro Universitário Euroamericano (Unieuro), Brasil
| |
Collapse
|
4
|
Colin GC, Pouleur AC, Gerber BL, Poncelet PA, de Meester C, D’Hondt AM, Vlassenbroek A, Houard L, Gevenois PA, Ghaye B. Pulmonary hypertension detection by computed tomography pulmonary transit time in heart failure with reduced ejection fraction. Eur Heart J Cardiovasc Imaging 2019; 21:1291-1298. [DOI: 10.1093/ehjci/jez290] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 07/25/2019] [Accepted: 11/11/2019] [Indexed: 11/14/2022] Open
Abstract
Abstract
Aims
To evaluate the relationships between pulmonary transit time (PTT), cardiac function, and pulmonary haemodynamics in patients with heart failure with reduced ejection fraction (HFrEF) and to explore how PTT performs in detecting pulmonary hypertension (PH).
Methods and results
In this prospective study, 57 patients with advanced HFrEF [49 men, 51 years ± 8, mean left ventricular (LV) ejection fraction 26% ± 8] underwent echocardiography, right heart catheterization, and cardiac computed tomography (CT). PTT was measured as the time interval between peaks of attenuation in right ventricle (RV) and LV and was compared between patients with or without PH and 15 controls. PTT was significantly longer in HFrEF patients with PH (21 s) than in those without PH (11 s) and controls (8 s) (P < 0.001) but not between patients without PH and controls (P = 0.109). PTT was positively correlated with pulmonary artery wedge pressure (PAWP) (r = 0.74), mean pulmonary artery pressure (r = 0.68), N-terminal pro-B-type natriuretic peptide (r = 0.60), mitral (r = 0.54), and tricuspid (r = 0.37) regurgitation grades, as well as with LV, RV, and left atrial volumes (r from 0.39 to 0.64) (P < 0.01). PTT was negatively correlated with cardiac index (r = −0.63) as well as with LV (r = −0.66) and RV (r = −0.74) ejection fractions. PAWP, cardiac index, mitral regurgitation grade, and RV end-diastolic volume were all independent predictors of PTT. PTT value ≥14 s best-detected PH with 91% sensitivity and 88% specificity (area under the receiver operating characteristic curve: 0.95).
Conclusion
In patients with HFrEF, PTT correlates with cardiac function and pulmonary haemodynamics, is determined by four independent parameters, and performs well in detecting PH.
Collapse
Affiliation(s)
- Geoffrey C Colin
- Division of Radiology, Cliniques Universitaires Saint-Luc UCL, Avenue Hippocrate 10, 1200 Brussels, Belgium
| | - Anne-Catherine Pouleur
- Division of Cardiology, Cliniques Universitaires Saint-Luc UCL, Avenue Hippocrate 10, 1200 Brussels, Belgium
| | - Bernhard L Gerber
- Division of Cardiology, Cliniques Universitaires Saint-Luc UCL, Avenue Hippocrate 10, 1200 Brussels, Belgium
| | - Pierre-Antoine Poncelet
- Division of Radiology, Cliniques Universitaires Saint-Luc UCL, Avenue Hippocrate 10, 1200 Brussels, Belgium
| | - Christophe de Meester
- Division of Cardiology, Cliniques Universitaires Saint-Luc UCL, Avenue Hippocrate 10, 1200 Brussels, Belgium
| | - Anne-Marie D’Hondt
- Division of Cardiology, Cliniques Universitaires Saint-Luc UCL, Avenue Hippocrate 10, 1200 Brussels, Belgium
| | | | - Laura Houard
- Division of Cardiology, Cliniques Universitaires Saint-Luc UCL, Avenue Hippocrate 10, 1200 Brussels, Belgium
| | | | - Benoit Ghaye
- Division of Radiology, Cliniques Universitaires Saint-Luc UCL, Avenue Hippocrate 10, 1200 Brussels, Belgium
| |
Collapse
|
5
|
Ait Ali L, Aquaro GD, Peritore G, Ricci F, De Marchi D, Emdin M, Passino C, Festa P. Cardiac Magnetic Resonance Evaluation of Pulmonary Transit Time and Blood Volume in Adult Congenital Heart disease. J Magn Reson Imaging 2019; 50:779-786. [DOI: 10.1002/jmri.26684] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/31/2019] [Accepted: 01/31/2019] [Indexed: 11/06/2022] Open
Affiliation(s)
- Lamia Ait Ali
- Institute of Clinical Physiology CNR; Massa Italy
- MRI Lab, Fondazione G. Monasterio CNR-Regione Toscana; Pisa Italy
| | | | | | - Fabrizio Ricci
- Institute for Advanced Biomedical Technologies, Department of Neuroscience, Imaging and Clinical Sciences; "G. d'Annunzio" University; Chieti Italy
| | | | - Michele Emdin
- Division of Cardiology and Cardiovascular Medicine; Fondazione G. Monasterio CNR-Regione Toscana; Pisa Italy
| | - Claudio Passino
- Division of Cardiology and Cardiovascular Medicine; Fondazione G. Monasterio CNR-Regione Toscana; Pisa Italy
| | - Pierluigi Festa
- MRI Lab, Fondazione G. Monasterio CNR-Regione Toscana; Pisa Italy
- Pediatric Cardiology and GUCH Unit; Fondazione G. Monasterio CNR-Regione Toscana; Massa Italy
| |
Collapse
|
6
|
Cao JJ, Li L, McLaughlin J, Passick M. Prolonged central circulation transit time in patients with HFpEF and HFrEF by magnetic resonance imaging. Eur Heart J Cardiovasc Imaging 2017; 19:339-346. [DOI: 10.1093/ehjci/jex051] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 03/02/2017] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jie J Cao
- Department of Cardiac Imaging, St Francis Hospital, The Heart Center, 100 Port Washington Blvd, Roslyn, NY 11576, USA
- Department of Cardiology, State University of New York at Stony Brook, 101 Nicolls Road, Stony Brook, NY 11794, USA
| | - Laura Li
- Department of Cardiac Imaging, St Francis Hospital, The Heart Center, 100 Port Washington Blvd, Roslyn, NY 11576, USA
| | - Jeannette McLaughlin
- Department of Cardiac Imaging, St Francis Hospital, The Heart Center, 100 Port Washington Blvd, Roslyn, NY 11576, USA
| | - Michael Passick
- Department of Cardiac Imaging, St Francis Hospital, The Heart Center, 100 Port Washington Blvd, Roslyn, NY 11576, USA
| |
Collapse
|
7
|
Cao JJ, Wang Y, McLaughlin J, Haag E, Rhee P, Passick M, Toole R, Cheng J, Berke AD, Lachman J, Reichek N. Left ventricular filling pressure assessment using left atrial transit time by cardiac magnetic resonance imaging. Circ Cardiovasc Imaging 2011; 4:130-8. [PMID: 21262980 DOI: 10.1161/circimaging.110.959569] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND Left atrial (LA) size and function reflect left ventricular (LV) hemodynamics. In the present study, we developed a novel method to determine LA circulation transit time (LATT) by MRI and demonstrated its close association with LV filling pressure. METHODS AND RESULTS All subjects were prospectively recruited and underwent contrast-enhanced MR dynamic imaging. Mean LATT was determined as the time for contrast to transit through the LA during the first pass. In an invasive study group undergoing clinically indicated cardiac catheterization (n=25), LATT normalized by R-R interval (nLATT) was closely associated with LV early diastolic pressure (r=0.850, P=0.001), LV end-diastolic pressure (r=0.910, P<0.001), and mean diastolic pressure (r=0.912, P<0.001). In a larger noninvasive group (n=56), nLATT was prolonged in patients with LV systolic dysfunction (n=47) (10.1±3.0 versus 6.6±0.7 cardiac cycles in normal control subjects, n=9; P<0.001). Using a linear regression equation derived from the invasive group, noninvasive subjects were divided into 3 subgroups by estimated LV end-diastolic pressure: ≤10 mm Hg, 11 to 14 mm Hg, and ≥15 mm Hg. There were graded increases from low to high LV end-diastolic pressure subgroups in echocardiographic mitral medial E/e' ratio: 9±5, 11±4, and 13±3 (P=0.023); in B-type natriuretic peptide (interquartile range): 44 (60) pg/mL, 87 (359) pg/mL, and 371 (926) pg/mL (P=0.002); and in N-terminal pro-B-type natriuretic peptide: 57 (163) pg/mL, 208 (990) pg/mL, and 931 (1726) pg/mL (P=0.002), demonstrating the ability of nLATT to assess hemodynamic status. CONCLUSIONS nLATT by cardiac MR is a promising new parameter of LV filling pressure that may provide graded noninvasive hemodynamic assessment.
Collapse
Affiliation(s)
- Jie J Cao
- St Francis Hospital, Research Department, State University of New York-Stony Brook, 100 Port Washington Blvd., Roslyn, NY 11576, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Shors SM, Cotts WG, Pavlovic-Surjancev B, François CJ, Gheorghiade M, Finn JP. Heart Failure: Evaluation of Cardiopulmonary Transit Times with Time-resolved MR Angiography. Radiology 2003; 229:743-8. [PMID: 14657311 DOI: 10.1148/radiol.2293021363] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To measure cardiopulmonary transit times in patients with heart failure by using low-dose, time-resolved magnetic resonance (MR) angiography and to determine if transit curves reflect conventional MR indexes of cardiac function. MATERIALS AND METHODS Twenty-six patients with heart failure and left ventricular (LV) systolic dysfunction (17 men and nine women; age range, 22-78 years) and thirteen control subjects (eight men and five women; age range, 23-59 years) were examined with MR imaging. The examination consisted of rapid cine MR imaging throughout the heart, followed by contrast material-enhanced time-resolved three-dimensional MR angiography of the cardiac chambers and pulmonary vasculature. Time-intensity curves for the pulmonary artery and ascending aorta were derived from the MR angiography images. Cardiopulmonary transit times and dispersions (full widths at half maximum [FWHM]) were determined from the curves. Transit times and FWHM values for the patients with heart failure were compared with control values by using two-tailed t tests, and transit time was correlated with standard LV functional parameters calculated from the cine MR images. RESULTS Cardiopulmonary transit times and FWHM values were significantly prolonged in the patients with heart failure compared with those in the control patients (P <.001). Transit time correlated directly with LV end-diastolic and end-systolic volumes and inversely with LV ejection fraction (R > 0.60). However, transit time did not correlate strongly with age, body surface area, heart rate, LV mass, stroke volume, cardiac output, or sphericity index. CONCLUSION Time-resolved MR angiography allows determination of cardiopulmonary transit times that are significantly prolonged in heart failure and correlate directly with LV volumes and inversely with LV ejection fraction.
Collapse
Affiliation(s)
- Stephanie M Shors
- Department of Radiology, Division of Cardiology, Feinberg School of Medicine, Northwestern University Medical School, Chicago, IL, USA
| | | | | | | | | | | |
Collapse
|
9
|
GRAETTINGER JS, MUENSTER JJ, SELVERSTONE LA, CAMPBELL JA. A correlation of clinical and hemodynamic studies in patients with hyperthyroidism with and without congestive heart failure. J Clin Invest 2000; 38:1316-27. [PMID: 13673087 PMCID: PMC442085 DOI: 10.1172/jci103906] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
10
|
|
11
|
Pierson RN, Grieco M, Swinton N, Dubin M. Circulation time end points. A quantitative comparison of saccharin and radioiodinated albumin as indicators. Circulation 1966; 34:997-1004. [PMID: 5333245 DOI: 10.1161/01.cir.34.6.997] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Ideal measurements are both simple and precise. The subjective circulation time has provided more simplicity than precision to three generations of physicians attempting to analyze cardiac function. Other more complex and less available measurements have displaced the circulation time from its prior vogue, probably because of the wide ranges of normal circulation time values. Yet, no other bedside measurement of cardiac function reflects both cardiac output and central blood volume with a single result.
The peripheral arrival characteristics of radioisotope-labeled albumin are described in 15 normal subjects and in 13 patients with heart failure. These circulation-times are compared with the taste end point of the saccharin indicator simultaneously injected.
Taste threshold, a variable not dependent on cardiac status, determines a significant proportion of the circulation time in both normal and failing circulations.
The wide availability of instruments which measure radioactivity, dye density, or thermal change as a function of time could reinvest the circulation time with a new precision, in return for a modest loss of simplicity. Bypass of the noncardiac variable taste threshold may be added to the other well-described advantages of an objective circulation-time measurement by use of the time of half-peak concentration as the end point in recording the circulation time.
Collapse
|
12
|
Korrelationen vollobjektiv gemessener Kreislaufzeiten mit Herzfrequenz, Alter, Gewicht und Körperlänge. Basic Res Cardiol 1966. [DOI: 10.1007/bf02119968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
13
|
Börner W, Moll E, Rau HP, Schröder J. Die Abhängigkeit der Kreislaufzeit von Alter, Geschlecht und Körperlänge. Basic Res Cardiol 1964. [DOI: 10.1007/bf02120035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
14
|
The “silent” lung in biventricular congestive heart failure. Am J Cardiol 1960. [DOI: 10.1016/0002-9149(60)90357-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
15
|
MAHL MM, LANGE K. Reliability of subjective circulation time determinations: a comparison between objective and subjective methods. Circulation 1958; 17:922-6. [PMID: 13537281 DOI: 10.1161/01.cir.17.5.922] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
When the fully objective dermofluorographic method of measurement of circulation time was compared with the subjective Decholin and saccharin methods, it was found that the values obtained with the subjective methods were often unreliable. The error was unpredictable in magnitude and occurrence, and was maximal in patients with failure.
Collapse
|