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The significance of the relative duration of systole—Its relation to age in healthy persons
SELECTED
Schlomka, Systole-Its 28: 673,
379
ABSTRACTS
The Significance of the IRelative Duration G., and Baab, W.: Relation to Age -in Healthy Persons. Ztschr. f. Kreislaufforsch.
of
1936.
On comparing the duration of electrical systole (the Q-T interval) with the cycle length in 336 normal resting subjects (having an average age of forty-three years) the author found that Fridericia’s formula (S = F Vq was applicable; F was found to be 8.02 -i: 0.02 in this group instead of 8.22 as found by Fridericia and 7.57 as found by Herxheimer. An analysis showed that systole/cycle ratio increased as a person aged, the correlation factor F varying from 7.95 in youth to 8.30 in senility. This is a functional response to aging. In children, F was 7.00; and the short duration of systole in this age group, the authors argue teleologically, permits more time for diastole at the more rapid heart rates which are present in children. L. N. Brtiuer, H.: Blood Pressure and Pulse Recording Ztsehr. f. Kreislaufforseh. 28: 814, 1936.
With
Electrical
K.
Transmission.
A triode circuit is described in which both grid and plate are provided with a The plate variable oscillatory circuit coupled by a mutual variable inductance. current can drop in the region of resonance of the grid and plate circuits from a maximum to almost zero. One of the condensers in the grid circuit is constructed In so as to permit small capacity changes when it is submitted tat pressure changes. this way pressure changes can cause changes in the plate current which can be recorded with an oscillograph. The entire circuit is modeled after one used in industry for measuring thickness of objects. (No description is given of the actual arrangement for connecting the measuring condenser to the animal). A. K.
Kiss, P. v.: 753,
Diphtheritic
Alterations
of the Heart.
Ztsehr.
f. Kreislaufforsch.
28:
1936.
This analysis is based on an experience with over 500 clinical As a result he divides diphtheritic hea.rt seen by the author. number of stages as follows: 1. The period three weeks
of early changes-the period and consists of the following
a. The period of toxin invasion No anatomical changes occur, tachycardia, and an elevated stimulation.
of cardiac subdivisions:
occurring during the and deaths are rare. blood pressure. It
cases of diphtheria involvement into
dysfunction-which
a
lasts
first two or three days. There is fever, malaise, is a period of cardiac
b. This is then followed by a period during which anatomical in the heart and/or the conducting system. Hence, block formities occur. Bradycardia is also present.
changes develop and QRST de-
e. This is then followed overactive. Tachycardias may lead to dilatation,
centers become time and these
by
a period in which the eatopic and arrhythmias occur at this ventricular fibrillation, and death.
2. The period of late changes-the period of heart weakness-which lasts from the third to the eighth or the twelfth week. The heart shows fragmentation and myolysis and also evidence of interstitial inilammation. Clinically, there are the various manifestations of heart farlure, and death, when it occurs, resembles that in other types of heart failure.
Schlomka, Systole-Its 28: 673,
379
ABSTRACTS
The Significance of the IRelative Duration G., and Baab, W.: Relation to Age -in Healthy Persons. Ztschr. f. Kreislaufforsch.
of
1936.
On comparing the duration of electrical systole (the Q-T interval) with the cycle length in 336 normal resting subjects (having an average age of forty-three years) the author found that Fridericia’s formula (S = F Vq was applicable; F was found to be 8.02 -i: 0.02 in this group instead of 8.22 as found by Fridericia and 7.57 as found by Herxheimer. An analysis showed that systole/cycle ratio increased as a person aged, the correlation factor F varying from 7.95 in youth to 8.30 in senility. This is a functional response to aging. In children, F was 7.00; and the short duration of systole in this age group, the authors argue teleologically, permits more time for diastole at the more rapid heart rates which are present in children. L. N. Brtiuer, H.: Blood Pressure and Pulse Recording Ztsehr. f. Kreislaufforseh. 28: 814, 1936.
With
Electrical
K.
Transmission.
A triode circuit is described in which both grid and plate are provided with a The plate variable oscillatory circuit coupled by a mutual variable inductance. current can drop in the region of resonance of the grid and plate circuits from a maximum to almost zero. One of the condensers in the grid circuit is constructed In so as to permit small capacity changes when it is submitted tat pressure changes. this way pressure changes can cause changes in the plate current which can be recorded with an oscillograph. The entire circuit is modeled after one used in industry for measuring thickness of objects. (No description is given of the actual arrangement for connecting the measuring condenser to the animal). A. K.
Kiss, P. v.: 753,
Diphtheritic
Alterations
of the Heart.
Ztsehr.
f. Kreislaufforsch.
28:
1936.
This analysis is based on an experience with over 500 clinical As a result he divides diphtheritic hea.rt seen by the author. number of stages as follows: 1. The period three weeks
of early changes-the period and consists of the following
a. The period of toxin invasion No anatomical changes occur, tachycardia, and an elevated stimulation.
of cardiac subdivisions:
occurring during the and deaths are rare. blood pressure. It
cases of diphtheria involvement into
dysfunction-which
a
lasts
first two or three days. There is fever, malaise, is a period of cardiac
b. This is then followed by a period during which anatomical in the heart and/or the conducting system. Hence, block formities occur. Bradycardia is also present.
changes develop and QRST de-
e. This is then followed overactive. Tachycardias may lead to dilatation,
centers become time and these
by
a period in which the eatopic and arrhythmias occur at this ventricular fibrillation, and death.
2. The period of late changes-the period of heart weakness-which lasts from the third to the eighth or the twelfth week. The heart shows fragmentation and myolysis and also evidence of interstitial inilammation. Clinically, there are the various manifestations of heart farlure, and death, when it occurs, resembles that in other types of heart failure.