Case 8 A 51-year-old man with hyperlipidemia was referred for exercise SPECT MPI for evaluation of nonexertional localized chest pain. He exercised for 8:54 minutes on a Bruce protocol, achieving an estimated workload of 10 METs. No exercise-induced symptoms were reported, and the blood pressure and ECG responses were normal. SPECT Images The SPECT images demonstrate a mild, nonreversible reduction in tracer activity in the lateral, anterior, inferior, and apical regions (relative to the septum). This perfusion pattern (highest myocardial tracer activity in the septum) is abnormal. In men, the highest myocardial tracer activity is typically found in the anterolateral region, since this region is least susceptible to photon attenuation. The observed perfusion pattern in this patient could represent multivessel coronary artery disease (CAD) with extensive subendocardial infarction, severe soft-tissue attenuation artifact, or increased septal wall thickness. Because of the limited spatial resolution of the SPECT camera, the apparent tracer activity in a myocardial region is directly related to the thickness of the myocardial wall. This is referred to as the “partial volume effect.” Defect Severity Polar Maps Only gold members can continue reading. Log In or Register to continue Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Related posts: Cardiac Neurotransmission Imaging: Single-Photon Emission Computed Tomography 18 Digital/Fast SPECT: Systems and Software Myocardial Perfusion: Magnetic Resonance Imaging Stay updated, free articles. Join our Telegram channel Join Tags: Clinical Nuclear Cardiology State of the Art and Future Direction Jun 11, 2016 | Posted by admin in CARDIOLOGY | Comments Off on 8 Full access? Get Clinical Tree
Case 8 A 51-year-old man with hyperlipidemia was referred for exercise SPECT MPI for evaluation of nonexertional localized chest pain. He exercised for 8:54 minutes on a Bruce protocol, achieving an estimated workload of 10 METs. No exercise-induced symptoms were reported, and the blood pressure and ECG responses were normal. SPECT Images The SPECT images demonstrate a mild, nonreversible reduction in tracer activity in the lateral, anterior, inferior, and apical regions (relative to the septum). This perfusion pattern (highest myocardial tracer activity in the septum) is abnormal. In men, the highest myocardial tracer activity is typically found in the anterolateral region, since this region is least susceptible to photon attenuation. The observed perfusion pattern in this patient could represent multivessel coronary artery disease (CAD) with extensive subendocardial infarction, severe soft-tissue attenuation artifact, or increased septal wall thickness. Because of the limited spatial resolution of the SPECT camera, the apparent tracer activity in a myocardial region is directly related to the thickness of the myocardial wall. This is referred to as the “partial volume effect.” Defect Severity Polar Maps Only gold members can continue reading. Log In or Register to continue Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Related posts: Cardiac Neurotransmission Imaging: Single-Photon Emission Computed Tomography 18 Digital/Fast SPECT: Systems and Software Myocardial Perfusion: Magnetic Resonance Imaging Stay updated, free articles. Join our Telegram channel Join Tags: Clinical Nuclear Cardiology State of the Art and Future Direction Jun 11, 2016 | Posted by admin in CARDIOLOGY | Comments Off on 8 Full access? Get Clinical Tree
