On Reading Electrocardiograms
نویسندگان
چکیده
منابع مشابه
Interesting electrocardiograms.
The ECG showed normal sinus rhythm at 65 per min., with a very short P-R interval (0.10 sec.). On the fourth beat of the first lead set (simultaneous leads I, II, III), which is marked with an arrow, there is an atrial premature, contraction. This latter beat has a low, rather flat P wave preceding the QRS with a P-R interval of 0.20 sec. The contrast between the sinus beats (with short PR) and...
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It is now well known that the results of almost any examination or investigation may be reported differently by different workers, for example, the interpretation of a medical history (Cochrane et al., 1951), the detection of cyanosis (Comroe and Botelhoe, 1947) or clubbing (Pyke, 1954), the clinical diagnosis ofemphysema (Fletcher, 1952), the radiological detection of tuberculosis (Birkelow et...
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Small discrete spikes appearing on the electrocardiogram (ECG) of a man with a pacemaker turned out to be fasciculation potentials picked up from leg muscles. To find out how common these spikes were all routine ECGs made in one month were reviewed. Spike potentials were found in six patients, and in each case they originated from somatic musculature. Spikes could nearly always be detected on E...
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Cancellation of juxtacardiac esophageal electrocardiograms, as demonstrated in this study, indicates certain limitations of the equivalent cardiac dipole hypothesis. A new and more fundamental theory developed here shows that in large measure cancellation occurs because the cancellation network is in effect a relatively insensitive electrocardiographic connection, and because there is always pr...
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ژورنال
عنوان ژورنال: Circulation
سال: 1974
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.49.6.1026