A Visual Guide to ECG Interpretation

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A VISUAL GUIDE TO ECG INTERPRETATION

ECG 9.11B A 61-year-old male presents with chest tightness.

COPD

Voltage is minimal in lead I because the ventricular axis in this patient’s heart is perpendicular to this limb lead. Hyperinflated lungs cause the heart to hang more vertically within the thoracic cavity. This patient’s chest radiograph (Fig. 9.6) shows hyperinflated lungs and a vertically elongated heart.

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FIGURE 9.6 Chest radiograph.