In a group of patients with systemic sclerosis, extracellular volume as measured on MRI corresponded with a risk for significant arrhythmia [78]. In a group of cardiac resynchronization therapy patients, an algorithm based on scar mass as quantitated by MRI identified 148 patients (68.2%) without implantable cardioverter-defibrillator therapy/sudden cardiac death during follow-up with a 100% negative predictive value [79], and appropriate implantable cardioverter-defibrillator therapy can be predicted in ischemic cardiomyopathy patients with primary prevention implantable cardioverter-defibrillator by quantifying the LGE border zone [80]. Concomitant assessment for structural heart disease and LV function can also be obtained. MRI can provide tissue-specific direction for targeted treatment of both ventricular and atrial arrhythmic foci [81,82]. Morphologic and functional criteria as assessed by MRI are useful in cases of suspected ARVC/D [83]. MRI Heart Function with Stress There is no relevant literature to support the use of MRI heart function with stress for the evaluation of dyspnea due to suspected cardiac arrhythmia, ischemia excluded. Radiography Chest There is no relevant literature to support the use of radiography for the evaluation of dyspnea due to suspected arrhythmia, ischemia excluded. Radiography may demonstrate cardiac silhouette enlargement as well as pulmonary vascular cephalization or edema as may be seen in setting of cardiac arrhythmia. Rb-82 PET/CT Heart There is no relevant literature to support the use of Rb-82 PET/CT heart for the evaluation of dyspnea due to suspected cardiac arrhythmia, ischemia excluded. SPECT or SPECT/CT MPI Rest and Stress There is scant literature regarding the use of SPECT or SPECT/CT MPI in the assessment of suspected arrhythmia.
Dyspnea Suspected Cardiac Origin Ischemia Already Excluded . In a group of patients with systemic sclerosis, extracellular volume as measured on MRI corresponded with a risk for significant arrhythmia [78]. In a group of cardiac resynchronization therapy patients, an algorithm based on scar mass as quantitated by MRI identified 148 patients (68.2%) without implantable cardioverter-defibrillator therapy/sudden cardiac death during follow-up with a 100% negative predictive value [79], and appropriate implantable cardioverter-defibrillator therapy can be predicted in ischemic cardiomyopathy patients with primary prevention implantable cardioverter-defibrillator by quantifying the LGE border zone [80]. Concomitant assessment for structural heart disease and LV function can also be obtained. MRI can provide tissue-specific direction for targeted treatment of both ventricular and atrial arrhythmic foci [81,82]. Morphologic and functional criteria as assessed by MRI are useful in cases of suspected ARVC/D [83]. MRI Heart Function with Stress There is no relevant literature to support the use of MRI heart function with stress for the evaluation of dyspnea due to suspected cardiac arrhythmia, ischemia excluded. Radiography Chest There is no relevant literature to support the use of radiography for the evaluation of dyspnea due to suspected arrhythmia, ischemia excluded. Radiography may demonstrate cardiac silhouette enlargement as well as pulmonary vascular cephalization or edema as may be seen in setting of cardiac arrhythmia. Rb-82 PET/CT Heart There is no relevant literature to support the use of Rb-82 PET/CT heart for the evaluation of dyspnea due to suspected cardiac arrhythmia, ischemia excluded. SPECT or SPECT/CT MPI Rest and Stress There is scant literature regarding the use of SPECT or SPECT/CT MPI in the assessment of suspected arrhythmia.