Heart disease

Heart disease

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Credit: DR P. MARAZZI/SCIENCE PHOTO LIBRARY

Caption: Heart disease. Electrocardiogram (ECG) of the heartbeat of a 78-year-old man with ventricular hypertrophy. An ECG measures the pumping of the heart's chambers using 12 electrodes (I-III, V1- V6, aVR, aVL and aVF), recording it as electrical waves (black). In ventricular hypertrophy the cells of the lower heart chambers enlarge. This patient may also have suffered an anterior myocardial infarction (MI, heart attack), the death of the front of the heart due to blockage of a coronary artery. This is indicated by the absence of R-waves (pointed peaks) in the traces for electrodes V1-V3. However, such an effect may also be seen in ventricular hypertrophy alone.

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Keywords: abnormal, anterior infarction, beating, cardiac, condition, diagnosis, diagnostics, disease, disorder, ecg, elderly, electrical waves, electrocardiogram, healthcare, heart, heart attack, irregular, male, man, medical, medicine, mi, myocardial, oap, old-aged pensioner, r-waves, senior citizen, traces, unhealthy, ventricular hypertrophy

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