Navigation Links
Difficult to diagnose cases of infectious endocarditis solved with SPECT/CT imaging agent
Date:8/1/2012

When combined with standard diagnostic tests, functional imaging procedures have been shown to reduce the rate of misdiagnosed cases of infectious endocarditis. According to new research published in the August issue of The Journal of Nuclear Medicine, single photon emission computed tomography (SPECT)/computed tomography (CT) with 99mTc-hexamethylpropleneamine oxime-labeled white blood cells (99mTc-HMPAO-WBC) can improve the diagnosis of infectious endocarditis in hard-to-diagnose cases.

Infectious endocarditis is an infection of the lining of the heart chambers and heart valves that is caused by bacteria, fungi or other infectious substances. It affects 2-4 people per 100,000 each year, with 25-50 percent of the cases occurring in patients older than 60 years. Mortality from infectious endocarditis remains high when this condition is undiagnosed and, therefore, not adequately treated.

The diagnosis of infectious endocarditis is becoming progressively more challenging in the past years because of a variety of factors: the indiscriminate use of antimicrobial agents in some clinical settings, the increased number of individuals with predisposing or underlying conditions (i.e., frail and elderly, immune-suppressed persons), and the increasing number of interventional cardiovascular procedures and placement of valve prostheses, intravascular devices and cardiac devices.

"SPECT/CT with 99mT-HMPAO-WBC is a nuclear medicine technique currently used for the management of patients with infection; its application in infectious endocarditis has been restricted to few reports," said Paola A. Erba, MD, lead author of the study. "With this work we aimed to open new perspective for the application of this technique."

Researchers conducted 99mTc-HMPAO-WBC SPECT/CT scans on 131 consecutive patients with suspected infectious endocarditis. Patients with permanent cardiac devices were excluded from the research as the devices might have introduced the infection. Results from the scans were compared to diagnostic tests for standard infectious endocarditistransthoracic or transesophageal echocardiography, blood cultures and the modified Duke Endocarditis Service criteria, which are recommended for classification.

Of the 131 patients, 97 were found to have uptake indicating infection. The 99mTc-HMPAO-WBC SPECT/CT scan was true-positive in 46 of 51 patients and false negative in 5 of 51 cases (90 percent sensitivity, 94 percent negative predictive value and 100 percent specificity and positive predictor value). In addition, septic embolism was detected in 41 percent of the patients.

"When the results of the 99mTc-HMPAO-WBC SPECT/CT scan were associated with either positive echocardiography or a positive blood culture, no cases of infectious endocarditis went undiagnosed," noted Erba. "This demonstrates the added value that 99mTc-HMPAO-WBC SPECT/CT scans can provide to assist physicians in their diagnosis and treatment decisions. Cardiologists and infectivologists dealing with infectious endocarditis should consider using 99mT-HMPAO-WBC when they are facing difficult situation."


'/>"/>
Contact: Susan Martonik
smartonik@snmmi.org
703-652-6773
Society of Nuclear Medicine
Source:Eurekalert

Related medicine news :

1. Study examines treatments for relieving breathing difficulties among patients with lung effusions
2. Older adults may need more vitamin D to prevent mobility difficulties
3. Food elimination diet identifies causes of difficulty swallowing and swelling of the throat
4. Autism Speaks provides strategies to help a child with autism shows difficult behaviors
5. Cancers with disorganized traffic systems more difficult to treat: U of A research
6. Study finds people have difficulty controlling multiple chronic conditions
7. A better tool to diagnose tuberculosis
8. Online Tool Could Diagnose Autism Quickly, Developers Say
9. Early treatment improves outcomes in rare, often undiagnosed form of encephalitis
10. Screening programs detect cases of undiagnosed rheumatic heart disease in low-resource countries
11. Obese More Likely to Be Diagnosed With Advanced Thyroid Cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/25/2017)... ... July 25, 2017 , ... SureVest Insurance Group, ... to communities across North Carolina, is launching a charity event in conjunction with ... for the ongoing fight against bladder cancer. , The Bladder Cancer Advocacy Network ...
(Date:7/25/2017)... ... July 25, 2017 , ... Facing medical needs with a ... is taking advantage of a new benefit for employees that is uncommon in American ... that the company supports me and other employees as new parents. It keeps our ...
(Date:7/24/2017)... ... July 24, 2017 , ... Cheerag D. Upadhyaya , M.D., M.Sc., ... Neuroscience Institute (SLMBNI), part of Saint Luke’s Health System . Dr. Upadhyaya ... D. Upadhyaya, MD. M.Sc., FAANS joins Stanley P. Fisher, M.D., who has ...
(Date:7/24/2017)... ... July 24, 2017 , ... A four ... the construction site and threatened numerous homes and businesses nearby, causing some 700 ... on NBCLosAngeles.com. Los Angeles Area consulting firm Fire Protection Group, Inc. notes that ...
(Date:7/24/2017)... ... July 24, 2017 , ... The Topricin Companies, formerly ... for Topricin’s revolutionary, natural, after-burn skin care product, Topricin After Burn Cream. ... long term skin conditions, including cancer. In the short term, overexposure to ...
Breaking Medicine News(10 mins):
(Date:7/11/2017)... , July 11, 2017  Dr. Echenberg, founder of Echenberg Institute, ... program to patients who suffer from painful intercourse and other painful pelvic ... vaginal atrophy due to menopause. ... VuVatech LLC ... created by Sarasota, Florida -based start-up company, VuVatech LLC, ...
(Date:7/10/2017)... medical equipment and supply demand is forecast to reach ... Equipment & Supplies: United States , a report ... demand for medical services – driven in large part ... gains in disposable personal income – will boost sales ... also drive sales as providers and patients seek the ...
(Date:7/10/2017)... , July 10, 2017  BDI Group ... and patient support services organization serving specialty pharmacies, ... the launch of four significant, value-added member programs ... insights, better manage reimbursement and improve access and ... factor therapies. ...
Breaking Medicine Technology: