scholarly journals The Transaxial Orientation Is Superior to Both the Short Axis and Horizontal Long Axis Orientations for Determining Right Ventricular Volume and Ejection Fraction Using Simpson's Method with Cardiac Magnetic Resonance

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Michael K. Atalay ◽  
Kevin J. Chang ◽  
David J. Grand ◽  
Shawn Haji-Momenian ◽  
Jason T. Machan ◽  
...  
Keyword(s):  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ejection Fraction ◽  
Right Ventricular ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Ventricular Volume ◽  
Short Axis ◽  
Intraclass Correlation Coefficients ◽  
Significant Difference

We sought to determine which of the three orientations is the most reliable and accurate for quantifying right ventricular (RV) volume and ejection fraction (EF) by cardiac magnetic resonance using Simpson’s method. We studied 20 patients using short axis (SA), transaxial (TA), and horizontal long axis (HLA) orientations. Three readers independently traced RV endocardial contours at end-diastole and end-systole for each orientation. End-diastolic volumes (EDVs), end-systolic volumes (ESVs), and EF were calculated and compared with the 3D piecewise smooth subdivision surface (PSSS) method. The intraclass correlation coefficients among the 3 readers for EDV, ESV, and EF were 0.92, 0.82, and 0.42, respectively, for SA, 0.95, 0.92, and 0.67 for TA, and 0.85, 0.93, and 0.69 for HLA. For mean data there was no significant difference between TA and PSSS for EDV (−2.6%, 95% CI: −8.2 to 3.3%), ESV (−5.9%, −15.2 to 4.5%), and EF (1.7%, −1.5 to 4.9%). HLA was accurate for ESV (−8.9%, −18.5 to 1.8%) and EF (−0.7%, −3.8 to 2.5%) but significantly underestimated EDV (−9.8, −16.6 to −2.4%). SA was accurate for EDV (0.5%, −6.0 to 7.5%) but overestimated ESV (10.5%, 0.1 to 21.9%) and had poor interrater reliability for EF. Conclusions. The TA orientation provides the most reliable and accurate measures of EDV, ESV, and EF.

scholarly journals Measurement of Ejection Fraction by Cardiac Magnetic Resonance Imaging and Echocardiography to Monitor Doxorubicin-Induced Cardiotoxicity

2019 ◽  
Vol 29 (01) ◽  
pp. 045-051 ◽  
Author(s):  
Tahir Tak ◽  
Camilla M. Jaekel ◽  
Shahyar M. Gharacholou ◽  
Marshall W. Dworak ◽  
Scott A. Marshall
Keyword(s):  
Breast Cancer ◽  
Magnetic Resonance Imaging ◽  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ejection Fraction ◽  
Cardiac Magnetic Resonance Imaging ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Resonance Imaging ◽  
Significant Difference

AbstractDoxorubicin is a standard treatment option for breast cancer, lymphoma, and leukemia, but its benefits are limited by its potential for cardiotoxicity. The primary objective of this study was to compare cardiac magnetic resonance imaging (CMRI) versus echocardiography (ECHO) to detect a reduction in left ventricular ejection function, suggestive of doxorubicin cardiotoxicity. We studied eligible patients who were 18 years or older, who had breast cancer or lymphoma, and who were offered treatment with doxorubicin with curative intent dosing of 240 to 300 mg/m2 body surface area between March 1, 2009 and October 31, 2013. Patients underwent baseline CMRI and ECHO. Both imaging studies were repeated after four cycles of treatment. Ejection fraction (EF) calculated by both methods was compared and analyzed with the inferential statistical Student's t test. Twenty-eight eligible patients were enrolled. Two patients stopped participating in the study before undergoing baseline CMRI; 26 patients underwent baseline ECHO and CMRI. Eight of those 26 patients declined posttreatment studies, so the final study population was 18 patients. There was a significant difference in EF pre- and posttreatment in the CMRI group (p = 0.009) versus the ECHO group that showed no significant differences in EF (p = NS). It appears that CMRI is superior to ECHO for detecting doxorubicin-induced reductions in cardiac systolic function. However, ECHO is less expensive and more convenient for patients because of its noninvasive character and bedside practicality. A larger study is needed to confirm these findings.

Using Pedometers to Estimate Ambulatory Physical Activity in Vietnam

2011 ◽  
Vol 8 (1) ◽  
pp. 52-61 ◽  
Author(s):  
Au Bich Thuy ◽  
Leigh Blizzard ◽  
Michael Schmidt ◽  
Costan Magnussen ◽  
Emily Hansen ◽  
...  
Keyword(s):  
Physical Activity ◽  
Concurrent Validity ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Population Based ◽  
Work Activities ◽  
Intraclass Correlation Coefficients ◽  
Significant Difference ◽  
Day Of The Week ◽  
Population Based Survey

Background:Pedometer measurement of physical activity (PA) has been shown to be reliable and valid in industrialized populations, but its applicability in economically developing Vietnam remains untested. This study assessed the feasibility, stability and validity of pedometer estimates of PA in Vietnam.Methods:250 adults from a population-based survey were randomly selected to wear Yamax pedometers and record activities for 7 consecutive days. Stability and concurrent validity were assessed using intraclass correlation coefficients (ICC) and Spearman correlation coefficients.Results:Overall, 97.6% of participants provided at least 1 day of usable recordings, and 76.2% wore pedometers for all 7 days. Only 5.2% of the sample participants were involved in work activities not measurable by pedometer. The number of steps increased with hours of wear. There was no significant difference between weekday and weekend in number of steps, and at least 3 days of recordings were required (ICC of the 3 days of recordings: men 0.96, women 0.97). Steps per hour were moderately correlated (men r = .42, women r = .26) with record estimates of total PA.Conclusions:It is feasible to use pedometers to estimate PA in Vietnam. The measure should involve at least 3 days of recording irrespective of day of the week.

scholarly journals Magnetic resonance imaging based coracoid morphology and its associations with subscapularis tears: a new index

2017 ◽  
Vol 11 (1_suppl) ◽  
pp. 52-58 ◽  
Author(s):  
Adam C. Watson ◽  
Richard P. Jamieson ◽  
Andrew C. Mattin ◽  
Richard S. Page
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Sagittal Plane ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Resonance Imaging ◽  
Intraclass Correlation Coefficients ◽  
Arm Position ◽  
Magnetic Resonance Imaging Mri

Background We aimed to assess the validity of magnetic resonance imaging (MRI) in assessing the subcorocoid space and determine the validity of novel sagittal plane subcorocoid space measurements. Methods We assessed 33 arthroscopically proven subscapularis tears with MRIs compared to 33 (instability) controls with normal subscapularis tendons. Three examiners analyzed MRIs for seven static indices of corocoid morphology, in axial and sagittal planes. We explored reviewer variation using intraclass correlation coefficients (ICC) and differences between the two groups was explored using t-tests. Results Groups were similar in characteristics but different in age (cases = 53, controls = 23). ICC showed good (2/7) or excellent (5/7) reliability. Small differences(<1.6 mm) were identified between subscapularis tears and controls in coraco–humeral distance, in axial ( p = 0.092) and sagittal planes ( p = 0.045). There were statistically significant differences between groups when analyzing the angular projection of the coracoid from the glenoid, in both sagittal ( p < 0.0001) and axial planes ( p = 0.045). Conclusions Acute inferior angulation of the corocoid in the sagittal plane may be associated with subscapularis tears. Static indices are measured within the scapula and not affected by arm position. MRI reliably provided a platform to assess the coracoid. Based on this, we currently consider corocoplasty in patients with subscapularis tears and a sagittal coroco–glenoid angle <60o to reduce potential impingement.

Inter- and Intratester Reliability of Lower Extremity Circumference Measurements

1998 ◽  
Vol 7 (4) ◽  
pp. 300-306 ◽  
Author(s):  
Gary L. Harrelson ◽  
Deidre Leaver-Dunn ◽  
A. Louise Fincher ◽  
James D. Leeper
Keyword(s):  
Lower Extremity ◽  
High Reliability ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Joint Line ◽  
Measuring Device ◽  
Intraclass Correlation Coefficients ◽  
Tape Measure ◽  
Significant Difference ◽  
Male High School

The purpose of this study was to examine the inter- and intratester reliability of lower extremity circumference measurements obtained by two testers using the same tape measure and two different tape measures. Twenty-one male high school student-athletes participated in this study. Two testers measured lower extremity circumference at three sites using a standard flexible tape measure and a Lufkin tape measure with a Gulick spring-loaded handle attachment. Measurement sites were medial joint line, 20 cm above medial joint line, and 15 cm below medial joint line. Intraclass correlation coefficients were computed for inter- and intratester comparisons for each measuring device and each measurement site. Results indicated high reliability but a significant difference between the two tape measures. These findings indicate that the reliability of lower extremity circumference measurements is not influenced by tester experience and that the Lufkin tape measure with the Gulick handle attachment is the more accurate of the two tape measures.

scholarly journals P364 The first prospective study of non-compaction cardiomyopathy patients with preserved ejection fraction using cardiac magnetic resonance feature tracking

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
A Kiss ◽  
A Szucs ◽  
A Furak ◽  
Z S Gregor ◽  
M Horvath ◽  
...  
Keyword(s):  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ejection Fraction ◽  
Feature Tracking ◽  
Longitudinal Strain ◽  
Apical Part ◽  
Left Ventricular ◽  
Functional Parameters ◽  
Significant Difference

Abstract Feature tracking (FT) is a new cardiac magnetic resonance (CMR) technique for strain measurement to reveal changes e.g. in noncompaction cardiomyopathy (NCMP) patients with good ejection fraction (EF). Our aim was to describe, first in the literature, the functional and CMR-FT strain values of NCMP patients with good EF and to compare them with their previous scans taken 4 years ago. At the Heart and Vascular Center of Semmelweis University 6743 CMR examinations were done between 2009-2015 and 232 NCMP patients were diagnosed. We followed up 27 patients, who had a previous examination at least 4 years ago, had no co-morbidities and whoes EF were above 50% (mean age: 37 ± 14.4 years, 18 males, mean follow up: 5.7 ± 1.5 years). Their parameters were compared to a matched control (C) group. The Medis Suite software was used for analysis, the MedCalc software for statistics, (p &lt; 0.05). We compared the patient’s previous (PREV) and recent (REC) functional parameters but did not find significant changes. Comparing the global longitudinal and global circumferential strains (GLS, GCS) and rotation (R) no difference was found between the PREV and the REC values. The GCS showed significant difference between NCMP and C groups (-30.2 ± 5.0 vs -35.9 ± 4.5; p &lt; 0.0001). We compared the segmental longitudinal and circumferential strain values of PREV vs. REC groups and NCMP vs C groups and found significant differences just in a few segments. The left ventricular (LV) apical part’s mean longitudinal strain value showed significant decrease on the REC scans compared to the PREV (PREV vs REC: -24.4 ± 7.7 vs -20.6 ± 5.1%; p &lt; 0.05) and a non-significant decrease compared to the C (C vs REC: -22.8 ± 7.5 vs -20.6 ± 5.1%; p= n.s.). The ratio of the average longitudinal strain value of the apical and basal part of the left ventricle was significantly smaller in the REC group compared to the PREV but did not differ from the C subjects ( PREV vs. REC: 1.5 ± 0.8 vs 1.0 ±0.3; C vs REC: 1.5 ± 0.3 vs 1.2 ± 0.5; p &lt; 0.05) We did not find worsening in the functional parameters of NCMP patients with good EF by the end of the follow up period. However, subclinical changes can be detected in the affected apical part of LV when using FT suggesting the need for follow up.

Cardiac magnetic resonance analysis of right ventricular function: Comparison of quantification in the short-axis and 4-chamber planes

2015 ◽  
Vol 57 (1) ◽  
pp. 50-55
Author(s):  
M. Souto Bayarri ◽  
L. Masip Capdevila ◽  
C. Remuiñan Pereira ◽  
J.J. Suárez-Cuenca ◽  
A. Martínez Monzonís ◽  
...  
Keyword(s):  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Right Ventricular ◽  
Ventricular Function ◽  
Right Ventricular Function ◽  
Short Axis ◽  
Resonance Analysis
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