The study of the pulse : arterial, venous, and hepatic, and of the movements of the heart / by James Mackenzie.

  • James Mackenzie
Date:
1902
Catalogue details

Licence: In copyright

Credit: The study of the pulse : arterial, venous, and hepatic, and of the movements of the heart / by James Mackenzie. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    309/360 page 281
    be noted that while the auricular wave, a, preceding the third carotid beat, c, in the tracing (Fig. 292) is immediately followed by the carotid pulse, the wave, a, preceding the next carotid beat is followed at a short distance by the carotid beat. On another occasion the pulse rate fell to twenty-eight, and the three auricular waves to the one pulse beat are constant (Fig. Fig. 202.—Shows the same as the two preceding tracings. Here the rate of the carotid, c, and of the radial varies, so that there is sometimes two and sometimes three auricular waves, a, for one pulse beat in the carotid, c, or radial. The auricular waves, a, preceding the carotid are separated from the carotid by varying intervals. 293). The waves are larger here. The size of the venous pulse used to vary—sometimes large as here, sometimes it disappeared altogether. The wave, a, that immediately follows the carotid pulse in this tracing I have assumed to be auricular, because it occurs at the same interval as the other auricular waves, and its presence completes the regular rhythm of the auricle. The only other thing it might be is the dicrotic wave of the carotid pulse; but this wave, as is well seen in the radial pulse, is of a Fig. 293.—Shows the same as the three preceding tracings. The pulse rate was twenty-eight per minute, and there are three auricular waves to one carotid or radial pulse. The jugular pulse was larger when this tracing was taken. small size, and on careful measurement is found to occur earlier in the cycle. Further, the wave, a, has a variable relation to the carotid pulse when it follows this pulse. Thus in Fig. 292 it follows the carotid wave at a distinct interval after the third beat, because the wave, a, preceding that carotid pulse is close to the carotid wave. The wave, a, follows immediately on the fourth carotid pulse, because the wave, a, preceding that beat is some distance in front of it. The rhythm of the auricle is preserved, whatever the period at which the ventricle contracts.
    digitised image 1
    digitised image 2
    digitised image 3