Inverted T waves in the precordial electrocardiogram of normal adolescents

Blackman, Norman S.; Kuskin, Lawrence

doi:10.1016/0002-8703(64)90004-3

Cited by 33 publications

(5 citation statements)

References 38 publications

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“…tion of the presence of ST-T interval depressions in the ECG often gives rise to difficulties in differential diagnosis. At times it may prove difficult to distinguish between functional ST-T changes in connection with exercise tests and changes of organic origin, primarily niyocarditis or sequelae after myocarditis, or even coronary insufficiency (5,11,20). I t is probably not unusual that sympathicotonic ECG changes are combined with those due to organic heart disease.…”

mentioning

confidence: 99%

Adrenergic Beta‐blockade and Electrocardiographical ST‐T Changes

Furberg

1967

Journal of Internal Medicine

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mentioning

confidence: 99%

Adrenergic Beta‐blockade and Electrocardiographical ST‐T Changes

Furberg

1967

Journal of Internal Medicine

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“…overt ST deviation in addition to T-wave inversion) as "juvenile pattern". 40 , 67 , 68 Contemporary literature supports the view that the juvenile pattern is more common in blacks than whites, 69 , 70 , 71 , 9 and more often in females than males, 72 and is especially common in black females. 59 , 69 Lastly, this pattern is not clearly related to strenuous athletic training, 73 , 74 although the evidence is mixed.…”

Section: The Persistent Juvenile T Wave Patternmentioning

confidence: 91%

Distinctive ECG patterns in healthy black adults

Walsh

Macfarlane

Prutkin

et al. 2019

Journal of Electrocardiology

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Six ECG patterns are found more frequently in healthy black adults than in whites. These patterns are presumably benign, but also may resemble those of malignant disease. 1) Healthy black adults show higher QRS voltage, and more often meet ECG criteria for left ventricular hypertrophy (LVH). Associated repolarization abnormalities can produce ST segment elevation (STE) that resemble ST elevation MI (STEMI). 2) The pattern of benign anterior STE, seen often in males, is more common in black subjects. Similar to LVH, this pattern may falsely suggest STEMI. 3) Both early repolarization (ER) and benign inferolateral STE are more common in black patients. Although they may convey a higher risk of fatal arrhythmias or cardiac death in white populations, it does not appear that black subjects with these patterns show a similar risk.4) The persistent juvenile T wave inversion pattern shows asymmetric T wave inversion (TWI) in V1-V4, without ST segment deviations. It is most common in black females, and is considered benign. However, this pattern can also resemble the anterior TWI of arrhythmogenic right ventricular cardiomyopathy (ARVC). 5) A pattern of anterior TWI with associated J point elevation is a common finding in the black population, especially athletes. It could suggest hypertrophic cardiomyopathy, but can be presumed to be a benign finding in black athletes, when TWI is limited to V1-V4 and preceded by J point elevation. 6) TWI in the lateral precordial leads, usually associated with end-QRS slurring or notches is seen much more often in apparently healthy black subjects than white subjects. Unlike the anterior TWI pattern, however, it cannot be presumed benign.In conclusion, awareness of these ECG patterns may help to avoid unnecessary diagnostic or therapeutic interventions, but also encourage appropriate investigations.

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“…The heart rate is regulated my both Sympathetic and parasympathetic nervous system. [4][5][6] Sympathetic impulse increases the heart rate and the parasympathetic impulse decrease the heart rate. Therefore the present study has been undertaken to find out the degree of normal variations in healthy individuals in different age groups.…”

Section: Introductionmentioning

confidence: 99%

The normal variations in heart rate and QRS complex of healthy individuals in different age groups

2014

Int J Res Med Sci

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Background: Electrocardiography is the only practical method of recording the electrical behavior of the heart. It is often an independent marker of myocardial disease and occasionally the only indication of the pathologic process. Therefore the present study has been undertaken to find out the degree of normal variations in healthy individuals in different age groups. Methods: This study was conducted after the institutional ethical clearance and informed written consent from all the subjects belongs to age group of 18 to 40 years of either sex. All the ECG was taken in resting and supine position using BPL CARDIART 308 machine. The body weight, the QRS duration, QRS axis, P wave duration, P wave voltage, P wave axis in the frontal plane, QTc interval, T wave voltage and QRS-T angle was calculated. The values are expressed as mean and the percentile was calculated in each parameters. Results: The weight ranges from 56.37 ± 6.53 kg. QRS duration ranged from 0.04 to 0.12 seconds mean of 0.064 seconds. QRS voltage in V 6 varied from 0.30 to 2.1 mv with a mean of 1.14 mv. The QTc interval was 0.31 to 0.47 seconds mean was 0.39 seconds. QRS-T angle varied from 0° to 70° with a mean of 30.9°. Conclusion: The study provides the frequency distribution and other statistical data when applied to all components of ECG which are commonly assessed during investigations of healthy young individuals. Having knowledge of these normal variants will be helpful in arriving at correct diagnosis.

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Inverted T waves in the precordial electrocardiogram of normal adolescents

Cited by 33 publications

References 38 publications

Adrenergic Beta‐blockade and Electrocardiographical ST‐T Changes

Adrenergic Beta‐blockade and Electrocardiographical ST‐T Changes

Distinctive ECG patterns in healthy black adults

The normal variations in heart rate and QRS complex of healthy individuals in different age groups

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