A junctional rhythm occurs when the electrical activation of the heart originates near or within the atrioventricular node, rather than from the sinoatrial node. Because the normal ventricular ...

The basic rhythm is sinus. Many premature beats are present, which are all preceded by prematurely occurring P waves (marked by x) and are all PACs. The premature P waves shown in Figure 2 are all ...

The rhythm is sinus with occasional premature atrial beats and left atrial abnormality. The frontal plane axis is –30° and the R wave in AVL is greater than 20 mV (note standardization deflections are ...

Answer: B. Hyperkalemia causing the Brugada electrocardiographic (ECG) pattern. In leads V1-2, the ST segment is elevated, which begins from the top of the R' wave and is downsloping, ending with an ...