Interesting ECG's/Holter

Sinus rhythm with prolonged PR interval. 
I called this phenomenon the Little Prince Effect, based on the famous book of ‎Antoine de Saint-Exupéry where the snake ate an elephant. The shape of the T wave looks similar to that draw. "Not all that glitters is gold".
ECG 49 years old female
ECG showed: 
ECG 1: Sinus rhythm then junctional escape beats. Two different P wave morphologies noted. Last two QRSs (Junctional with retrograde conduction).
ECG 2: sinus rhythm with a  sinoatrial exit block.
ECG 3: sinus bradycardia due to sinoatrial exit blocks.
ECG in a 64 years old male.
ECG showed Sinus bradycardia with ST-T abnormalities (negative T waves) and intermittent partial intraventricular conduction delay (most likely LAFB morphology)
Comments: prolonged PR noted during sinus bradycardia, ? borderline first degree A-V block, ? first degree A-V block, ? normal for rate?
Picture
ECG in a 43 years old female.
ECG showed Sinus rhythm followed by a 15 beat run of accelerated idioventricular rhythm.  (Fifth QRS = fusion beat)

ECG in a 86 years old male with AF and episodes of non-sustained polymorphic ventricular tachycardia
ECG in a 91 years old female. ECG showed intermittent episodes of AIVR
ECG in a 72 years old female
ECG showed: atrial fibrillation with controlled ventricular response, one ventricular premature beat followed by a ventricular standstill (7.8s) continuing with a junctional escape rhythm (with retrograde conduction, one P wave noted "sinus beat captured") and then re initiate  atrial fibrillation.
ECG in a 83 years old male
Atrial flutter with a 6.5s pause. (sleeping).
Holter in a 79 years old male:
High degree A-V block with narrow QRS (Supra His). One 4.0s pause (Ventricular asystole).
Also one episode of second degree A-V block Mobitz I Wenckebach.
Holter in a 37 years old male post radiofrequency ablation:
ECG 1: Intermittent WPW pattern (in bigeminy)
ECG 2: This patient showed WPW pattern during low heart rates (benign).
ECG 3: Permanent WPW morphology during sleeping time.
Holter in a 72 years old female with symptoms of light headed and dizziness.

ECG showed high degree A-V block.
ECG 1 showed variable R-R cycles due to high degree A-V block with junctional escape beats.

ECG  2 showed : most likely junctional escape rhythm.
Holter in a 85 years old 

1- Sinus rhythm with a ventricular premature beat, followed by a run of accelerated idio-ventricular rhythm. (Ventricular rate approximately 75bpm).








2- Ventricular polymorphic ventricular premature beats (One ventricular triplet and one ventricular couplet). Ventricular trigeminy noted on rhythm strip.









3- Atrial tachycardia noted with one blocked atrial premature beat. 
At least 2 different P wave morphologies were noted. One 1.7s pause noted before resetting to sinus bradycardia.  
HOLTER in a 73 y-o male:
Three consecutive ECG rhythm strips showing : Sinus bradycardia (50bpm)  followed by a small sinus pause, continue with a brief episode of atrial fibrillation/blocked atrial tachycardia, then a sinus arrest (6.7s).
Ambulatory ECG showed: Heart rate trend: very flat throughout with ventricular rates between 106 and
114bpm (due to atrial flutter or blocked atrial tachycardia with 2:1 A-V conduciton.
Blocked atrial tachycardia/Atrial flutter with (2:1 A-V conduction). Atrial rate approx 214bpm, ventricular  rate 112bpm.
Blocked  atrial tachycardia /Atrial flutter with 2:1 A-V conduction