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Paroxysmal Supraventricular Tachycardia
Most patients present with palpitations and dizziness, and their electrocardiogram demonstrates a narrow QRS complex and regular tachycardia with hidden or inverted P waves[ncbi.nlm.nih.gov]
P waves in leads II, III, aVF, V 3 -V 6 Rare: References: [1] [3] [4] Pathophysiology AVNRT The AV node contains two electrical pathways: one fast and one slow the electrical[amboss.com]
Retrograde P waves follow each QRS complex: upright in V1-3; inverted in II, III and aVF.[lifeinthefastlane.com]
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Supraventricular Tachycardia
Retrograde P waves follow each QRS complex: upright in V1-3; inverted in II, III and aVF.[lifeinthefastlane.com]
Retrograde P waves are visible preceding each QRS complex (upright in V1, inverted in lead II).[lifeinthefastlane.com]
Upright retrograde P waves in aVR Inverted retrograde P waves lead II Example 5b The same patient following resolution of the AVNRT: Sinus rhythm.[lifeinthefastlane.com]
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Atrial Bigeminy
PACS arising close to the AV node (“low atrial” ectopics) activate the atria retrogradely, producing an inverted P wave with a relatively short PR interval 120 ms (PR interval[lifeinthefastlane.com]
Wave: Premature and abnormal or hidden PR Interval: Less then 200ms QRS Interval: Abnormal Junctional Rhythm Heart Rate: 40 to 60 beats per minute (BPM) P Wave: Inverted,[heartrhythmguide.com]
As atrial conduction does not precede ventricular conduction, the P wave may appear inverted or even be hidden in the QRS complex .[cardionetics.com]
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Premature Atrial Contractions
wave is abnormal Premature (earlier than expected) Morphology different than normal P wave Inverted P wave suggests atrial source near AV junction Nearly normal P waves suggest[fprmed.com]
PACS arising close to the AV node (“low atrial” ectopics) activate the atria retrogradely, producing an inverted P wave with a relatively short PR interval 120 ms (PR interval[lifeinthefastlane.com]
, and direction (commonly appears small, upright, and pointed; may be inverted); abnormal P wave commonly found hidden in preceding T wave, distorting the T-wave contour PR[aibolita.com]
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Flecainide
The long PR interval, 1:1 atrioventricular conduction and inverted P waves in leads II, III, and aVF consistent with permanent junctional reciprocating tachycardia are to[annalspc.com]
[…] were inverted in leads II, III, and aVF [Figure 2] a.[annalspc.com]
With administration of adenosine 200 mcg/kg IV rapid push, the tachycardia terminated with a P-wave transiently and recurred with a sinus beat without prolongation of PR interval[annalspc.com]
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Ostium Primum Atrial Septal Defect
Mild right ventricular hypertrophy Inverted P waves in Sinous Venosus type Right Bundle Branch Block is seen which is partial or complete 17.[slideshare.net]
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Jawad Syndrome
Electrocardiogram (ECG) showed inverted “P” waves in L1 and AVL on left-sided chest leads ( Figure 2 ).[panafrican-med-journal.com]
P waves in L1 and AVL on left-sided chest leads Figure 3: HRCT of the chest in parenchymal window and in axial section reveals bronchiectasis and dextrocardia Figure 4[panafrican-med-journal.com]
[…] radiograph shows in the lower zone bronchiectasis changes (white star), dextrocardia (blue arrow) and right-sided gastric bubble (white arrow) Figure 2 : electrocardiogram showed inverted[panafrican-med-journal.com]
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Atrial Arrhythmia
An arrhythmia is an abnormal heart rhythm. There are several types of arrhythmias, named by the chambers of the heart in which they occur (atria or ventricles) and by what effect they have on the heart's rhythm. An arrhythmia may happen for different reasons: The heartbeat may begin in a part of the heart[…][columbiasurgery.org]
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Sinus Arrhythmia
You might be tempted to call this sinus rhythm with premature atrial beats but the inverted P wave (P6) before R4 is not premature. So, this is not a PAC.[learningecg.blogspot.com]
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Lown-Ganong-Levine Syndrome
The criteria include a normal or inverted P wave, a short PR interval less than or equal to 0.12 second (120 ms), with normal QRS complex duration, the absence of a delta[symptoma.com]
Alterations of the ST segment and inverted T waves also appear. Summarizing: Sinus P wave, except alterations. Shortened PR interval (less than 0,12 s). Delta wave.[en.my-ekg.com]