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Skip search results from other journals and go to results- 4 JMIR Research Protocols
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LVEF, the percentage of blood in the left ventricle that exits into the aorta during a cardiac cycle, is determined using various imaging techniques, such as echocardiography, cardiac magnetic resonance imaging, nuclear cardiology, or cardiac catheterization [1,4,5]. Thus, the classification of HF depends on the accurate determination of LVEF using expensive diagnostic methods obtained in outpatient or inpatient settings [6,7].
JMIR Cardio 2024;8:e57111
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In the outpatient setting, the investigation of cardiopulmonary dysfunction often involves a series of single-organ assessment tools such as computed tomography imaging of the lung, complex lung function testing, and transthoracic echocardiography. These single-organ, static investigations provide little insight into cardiopulmonary performance when under physiological (eg, exercise) or pathological (eg, sepsis) stress [18,19].
JMIR Res Protoc 2024;13:e52076
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In addition to preoperative echocardiography reports that described the CHD conditions, the following patient and surgical characteristics were also collected: age, sex, height, weight, preoperative oxygen saturation of the right-upper limb, surgery time, cardiopulmonary bypass time, aortic cross-clamping time, mechanical ventilation time, duration of postoperative hospital stay, duration of ICU stay, and postoperative complications (the detailed definitions of postoperative complications are shown in Table
JMIR Med Inform 2024;12:e49138
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One possible reason for this is the technical challenge of accurately imaging the complex RV structure using conventional echocardiography [9], which is the preferred imaging modality for studying an athlete’s heart. Cross-sectional studies using novel techniques such as 3 D echocardiography have demonstrated that RV enlargement is more prevalent in endurance athletes compared to strength athletes.
JMIR Form Res 2023;7:e47876
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Echocardiography (ECHO) is a type of ultrasonographic scan used for examining the cardiac function and morphology [1]. Due to the practicality of image acquisition, relatively low cost, and little-to-no-risks for the patient, ECHO remains the most widely used cardiac imaging examination [2].
JMIR Res Protoc 2023;12:e44650
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CMR: cardiac magnetic resonance; COV–: without SARS-Co V-2 infection; COV+: with SARS-Co V-2 infection; CT: computed tomography; ECG: electrocardiography; hs-Tn T: high-sensitivity troponin T; RT-PCR: real-time reverse transcription–polymerase chain reaction; Tn T–: without biological cardiac injury; Tn T+: with biological cardiac injury; TTE: transthoracic echocardiography.
JMIR Res Protoc 2022;11(1):e24931
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The North American study also found that a further 32% of survivors with otherwise normal conventional echocardiography showed evidence of cardiac dysfunction with abnormal strain measurements by speckle tracking echocardiography, a novel echocardiographic technique [7]. Additional studies have also suggested that speckle tracking echocardiography might be more sensitive to preclinical cardiac dysfunction than conventional echocardiography in CCS [11,12].
JMIR Res Protoc 2020;9(6):e17724
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