II. Definitions
- PR Interval
- Duration from the START of the P Wave to the start of the QRS Complex
- Represents electrical conduction from atrial depolarization to the start of ventricular depolarization
- PR Segment
- Duration from the END of the P Wave to the start of the QRS Complex
III. Findings: Normal
- PR Segment is Isoelectric
- Normal Interval in Adults: 0.12 to 0.20 s (120 to 200 ms)
- Normal interval in Children: 0.07 to 0.18 s (70 to 180 ms)
IV. Causes: Prolonged PR Interval
- AV Node Block
- Hyperthyroidism (occasional)
- Normal variant (rarely)
V. Causes: Shortened PR Interval
- Wolf-Parkinson-White Syndrome (WPW Syndrome)
- Always look closely for a Delta Wave in Short PR Interval
- AV Nodal Rhythm (Junctional Rhythm)
- Low atrial nodal rhythm
- Lown-Ganong-Levine (LGL)
- Hypertension
- Normal variant
VI. Causes: PR Depression
- Myocardial Infarction involving atrium
- Acute Pericarditis (also with downsloping TP segment)
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Related Studies
| Concepts | Finding (T033) |
| SnomedCT | 251245007 |
| English | PR depression, PR depression (finding) |
| Spanish | depresión del PR (hallazgo), depresión del PR |
Ontology: Electrocardiogram: P-R interval (C0429087)
| Definition (NCI) | The time interval between the start of the P wave and the beginning of the QRS complex in the cardiac cycle. |
| Concepts | Finding (T033) |
| SnomedCT | 164948002, 365411005, 142118007 |
| Italian | Intervallo PR dell'elettrocardiogramma |
| English | ECG: PR interval NOS (observable entity), electrocardiogram intervals PR, PR interval on ECG, PR interval, ECG: PR interval NOS, Electrocardiogram: P-R interval, electrocardiogram: PR interval, electrocardiogram: PR interval (procedure), PR Interval, Finding of ECG PR interval, Electrocardiogram PR interval, Electrocardiogram: P-R interval NOS (observable entity), ECG: PR interval NOS (finding), Electrocardiogram: P-R interval NOS, Finding of electrocardiogram PR interval (finding), Finding of electrocardiogram PR interval, Finding of ECG PR interval (finding), PR interval - finding |
| Japanese | 心電図ＰＲ間隔, ｼﾝﾃﾞﾝｽﾞPRｶﾝｶｸ |
| Spanish | electrocardiograma: intervalo PR, SAI (entidad observable), hallazgo en el intervalo PR según el electrocardiograma, hallazgo en el intervalo PR según el electrocardiograma (hallazgo), intervalo PR - hallazgo, hallazgo relacionado con el intervalo PR del electrocardiograma (hallazgo), hallazgo electrocardiográfico en el intervalo PR (hallazgo), hallazgo electrocardiográfico en el intervalo PR, hallazgo relacionado con el intervalo PR del ECG, hallazgo relacionado con el intervalo PR del electrocardiograma, electrocardiograma: intervalo P-R, SAI (entidad observable), electrocardiograma: intervalo PR, SAI, ECG: PR interval NOS, ECG: intervalo PR, SAI, electrocardiograma: intervalo P-R, SAI, electrocardiograma: intervalo P-R, SAI (hallazgo), Intervalo PR del electrocardiograma |
| Czech | PR interval na elektrokardiogramu |
| Hungarian | Elektrokardiogram PR távolság |
| Portuguese | Intervalo PR de ECG |
| Dutch | elektrocardiogram PR-interval |
| French | Espace P-R d'électrocardiogramme |
| German | Elektrokardiogramm PR-Intervall |
Ontology: Prolonged PR interval (C0600125)
| Definition (NCI) | An electrocardiographic finding of a PR interval of more than 0.20 seconds in adults. |
| Concepts | Finding (T033) |
| SnomedCT | 367413009, 195041009, 142116006, 164947007, 14256006 |
| English | PR INTERVAL PROLONGED, Prolonged P-R interval, [dup] NOS, PR interval prolonged, PR prolongation, Prolonged P-R interval, NOS (finding), Electrocardiogram PR interval prolonged, Electrocardiogram PR prolongation, Prolonged P-R interval, NOS, Prolonged PR Interval by ECG Finding, Prolonged PR Interval by EKG Finding, Prolonged PR Interval, Prolonged PR interval, Prolonged P-R interval, Prolonged PR interval (finding), Prolonged P-R interval NOS, Prolonged P-R interval, NOS (disorder) |
| Italian | Intervallo PR dell'elettrocardiogramma, prolungato, Intervallo PR allungato, Allungamento del PR |
| Dutch | PR-interval verlengd, PR verlenging, elektrocardiogram PR-interval verlengd, elektrocardiogram PR-verlenging |
| French | Prolongation de l'intervalle PR, Intervalle PR prolongé, Espace PR de l'électrocardiogramme prolongé, ALLONGEMENT DE L'INTERVALLE PR, Prolongation PR de l'électrocardiogramme |
| German | PR-Intervall verlaengert, PR-Verlaengerung, Elekrokardiogramm: PR-Strecke verlaengert, PR-INTERVALL VERLAENGERT, Elektrokardiogramm-PR verlaengert |
| Portuguese | Intervalo PR prolongado, Prolongamento de PR, Intervalo PR do ECG prolongado, ALONGAMENTO DO INTERVALO PR, Prolongamento PR do ECG |
| Spanish | Prolongación de PR, Intervalo PR alargado, Prolongación del intervalo PR, intervalo P-R prolongado [dup] (trastorno), PR PROLONGADO, intervalo P-R prolongado [dup] (hallazgo), intervalo P - R prolongado, intervalo P-R prolongado [dup], P-R prolongado, intervalo P-R prolongado, intervalo PR prolongado (hallazgo), intervalo PR prolongado, Prolongación del intervalo PR del ECG |
| Japanese | 心電図ＰＲ間隔延長, 心電図ＰＲ延長, ＰＲ間隔延長, ＰＲ延長, PRｶﾝｶｸｴﾝﾁｮｳ, ｼﾝﾃﾞﾝｽﾞPRｴﾝﾁｮｳ, ｼﾝﾃﾞﾝｽﾞPRｶﾝｶｸｴﾝﾁｮｳ, PRｴﾝﾁｮｳ |
| Czech | PR interval prodloužený, Prodloužení PR intervalu, Prodloužení PR intervalu na elektrokardiogramu, PR interval na elektrokardiogramu prodloužený |
| Hungarian | PR szakasz megnyúlt, PR megnyúlás, Elektrokardiogram PR megnyúlás, Elektrokardiogram PR távolság megnyúlt |
