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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]
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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Supraventricular Tachycardia
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]
Upright retrograde P waves in V2 Inverted retrograde P waves in lead II Example 6b The same patient following resolution of the AVNRT: Sinus rhythm.[lifeinthefastlane.com]
Retrograde P waves follow each QRS complex: upright in V1-3; inverted in II, III and aVF.[lifeinthefastlane.com]
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Atrial Bigeminy
P wave with a PRI 120ms.[app.figure1.com]
This is visible on the ECG as an inverted P wave (“retrograde P wave”), usually occurring after the QRS complex.[lifeinthefastlane.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]
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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]
However, the P wave is different from the sinus P waves.[aibolita.com]
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Atrial Arrhythmia
An arrhythmia is a change in the heart's normal rate or rhythm, normally between 60 and 100 beats per minute. Arrhythmias are classified by their location in the heart and by their speed or rhythm. An atrial arrhythmia is an abnormality that occurs in one of the two upper chambers of the heart, the left or right[…][mccardio.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]
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]
[…] were inverted in leads II, III, and aVF [Figure 2] a.[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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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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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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Torsades De Pointes
Example 4 Torsades de Pointes: Sinus rhythm, or possibly ectopic atrial rhythm (biphasic / inverted P waves in lead II).[lifeinthefastlane.com]