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A. Superior vena cavaP. Ascending aortaQ. Aortic arch
L. Left atriumM. Biscuspid (mitral) valveN. Left ventricleO. Aortic semilunar valveV. Chordae tendinaeW. Papillary muscleY. Myocardium (cardiac muscle)
I. Left pulmonary arteryK. Left pulmonary veinsR. Descending artery
C. Right atriumD. Tricuspid valve5. Anterior cardiac vein
Q. Aortic archS. Brachiocephalic arteryT. Left common carotid arteryU. Left subclavion artery
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E. Right ventricleV. Chordae tendinaeW. Papillary muscle4. Anterior interventricular artery
SA node generates impulse; atrial excitation begins
Impulse delayed at AV node
Sequence of heart excitation: Link to ECG, text and image (4 steps); See Fig. 31.3
Impulse passes to heart apex; ventricularexcitation beings
Ventricular excitationcomplete
Fig. 31.2: Know the intervals of an ECG; Be able to link this to nodes and contraction
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