The Significance of Equivocal Exercise Treadmill ECG for Intermediate Risk Chest Pain Assessment - Insight From Coronary CT Angiography Data.Background Exercise treadmill test (ETT) is commondoi:10.1016/j.hlc.2017.01.015Gary T.E. LauHenry Wei...
Although it has been suggested that systolic compression of a bridged coronary artery may not be responsible for ischemia because most coronary blood flow takes place in diastole, angiographic studies have demonstrated arterial compression in diastole as well (206, 207). If chest pain symptoms in...
PathophysiologyThe exact etiology of MHA is in evolution. At one time it was thought that vasoconstriction occurs, which leads to distal ischemia (with the subsequent 'aura'), which then led to an area of vasodilatation and a concomitant 'throbbing' headache. Now it is thought to have more t...
NT-proBNP is a cleavage product of the prohormone proBNP, which is synthesized predominantly in the left ventricle myocyte in reaction to ventricular wall stress and myocardial ischemia35,36. Plasma NT-proBNP levels provide prognostic information in a variety of cardiovascular settings, including heart ...
Normal saline at 150 mEq/L can be given at 3 mL/kg/h for 1 hour before exposure, then at 1 mL/kg/h for 6 hours after the procedure. In a large randomized controlled trial, sodium bicarbonate was not found to be superior to normal saline, whereas acetylcysteine was equivo...
Stress echocardiography with dypiridamole has been used to test prognostic role of electrographic signs of inducible ischemia in patients with HCM. In one paper [75], ECG signs of myocardial ischemia elicited by dipyridamole were frequent identify patients at higher risk of cardiac major and minor...
The relationship between luminal stenosis measured by coronary CT angiography (CCTA) and severity of stress-induced ischemia seen on single photon emission
The prescribed exercise intensity, expressed as a percentage of the CRF (peak or maximal METs) or aerobic capacity, should be above a minimum level required to induce a “training effect,” yet below the metabolic load that evokes significant symptoms, ECG or blood pressure abnormalities. For de...
It also serves to explain angina and subendocardial ischemia far beyond CFR alone as also illustrated in Figure 3. For case A, global CFR for this example was 1.9, which might be incorrectly interpreted as microvascular disease. However, stress perfusion is uniformly excellent (3.5 ml/min/g)...
Stress echocardiography with dypiridamole has been used to test prognostic role of electrographic signs of inducible ischemia in patients with HCM. In one paper [75], ECG signs of myocardial ischemia elicited by dipyridamole were frequent identify patients at higher risk of cardiac major and minor...