Aleys Health Care

09/02/2026

Learn QT Interval Prolongation in a simple and easy to understand medical lecture designed for nursing, medical, pharmacy, and healthcare students.
In this lesson, you'll learn what the QT interval measures on an ECG, the normal QT interval range, why QT prolongation occurs, and how delayed ventricular repolarization can lead to Early Afterdepolarizations (EADs), Torsades de Pointes, and ventricular fibrillation.
This lecture also explains the most important medications associated with QT prolongation, including macrolides, fluoroquinolones, antipsychotics, antidepressants, and antiarrhythmic drugs. You'll also learn the Vaughan Williams Classification of Antiarrhythmic Drugs, including Class I, II, III, and IV drugs, along with the difference between rhythm control and rate control.
This educational video is ideal for:
Nursing Students (RN, LPN)
Medical Students
Pharmacy Students
Physician Assistant Students
Healthcare Professionals
NCLEX Review
USMLE Review
Pharmacology Review

Learn QT Interval Prolongation in a simple and easy to understand m...

08/30/2026

Myocardial Action Potential Explained - Learn the Electrical Phases of the Heart Step by Step!
In this medical education lecture, you'll learn how the myocardial action potential controls every heartbeat and how the heart's electrical system allows it to contract and relax efficiently. This lesson explains the five phases of the cardiac action potential (Phase 0 to Phase 4) in simple, easy to understand language while maintaining medical accuracy.
You'll discover how sodium (Na*), calcium (Ca'*), and potassium (K*) move across heart muscle cell membranes to generate electrical impulses that coordinate normal cardiac function. We also explain where myocardial action potentials occur, including atrial muscle cells, ventricular muscle cells, and Purkinje fibers.
This lecture also connects myocardial action potentials with ECG waveforms, helping you understand how electrical events inside the heart appear on an electrocardiogram.
In this lecture, you'll learn:
What is the myocardial action potential?
The five phases of the cardiac action potential
Phase O: Rapid depolarization
Phase 1: Early repolarization

Phase 2: Plateau phase
Phase 3: Final repolarization
Phase 4: Resting phase
Functions of sodium, calcium, and potassium ions Cardiac electrical conduction
Atrial muscle cells, ventricular muscle cells, and Purkinje fibers
ECG correlation with cardiac electrical activity
Why the plateau phase is unique to heart muscle Clinical importance of the cardiac action potential
Whether you're a medical student, nursing student, pharmacy student, paramedic, physician assistant student, or healthcare professional, this lecture provides a clear and structured explanation of one of the most important concepts in cardiovascular physiology.
If you enjoy evidence based medical education, consider subscribing to for more simplified lectures on anatomy, physiology, pharmacology, cardiology, ECG interpretation, and clinical medicine.

Myocardial Action Potential Explained – Learn the Electrical Phases...

08/26/2026

Myocardial Action Potential Explained - Learn the Electrical Phases of the Heart Step by Step!
In this medical education lecture, you'll learn how the myocardial action potential controls every heartbeat and how the heart's electrical system allows it to contract and relax efficiently. This lesson explains the five phases of the cardiac action potential (Phase 0 to Phase 4) in simple, easy to understand language while maintaining medical accuracy.
You'll discover how sodium (Nat), calcium (Ca**), and potassium (K*) move across heart muscle cell membranes to generate electrical impulses that coordinate normal cardiac function. We also explain where myocardial action potentials occur, including atrial muscle cells, ventricular muscle cells, and Purkinje fibers.
This lecture also connects myocardial action potentials with ECG waveforms, helping you understand how electrical events inside the heart appear on an electrocardiogram.
In this lecture, you'll learn:
What is the myocardial action potential?
The five phases of the cardiac action potential

Phase O: Rapid depolarization
Phase 1: Early repolarization
Phase 2: Plateau phase
Phase 3: Final repolarization
Phase 4: Resting phase
Functions of sodium, calcium, and potassium ions Cardiac electrical conduction
Atrial muscle cells, ventricular muscle cells, and Purkinje fibers
ECG correlation with cardiac electrical activity
Why the plateau phase is unique to heart muscle Clinical importance of the cardiac action potential
Whether you're a medical student, nursing student, pharmacy student, paramedic, physician assistant student, or healthcare professional, this lecture provides a clear and structured explanation of one of the most important concepts in cardiovascular physiology.

Myocardial Action Potential Explained – Learn the Electrical Phases...

08/25/2026

Have you ever been drifting off to sleep when suddenly your whole body jerks and wakes you up?
That strange sensation is called a hypnic jerk (or sleep start). In this video, you'll learn why it happens, what causes it, and why your brain may briefly think you're falling as you transition into sleep.
Discover how stress, caffeine, lack of sleep, and late night exercise can make hypnic jerks more likely and why they're usually nothing to worry about.
Watch until the end to learn simple tips that may help reduce them!

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Disclaimer: This video is for educational and informational purposes only and is not intended as medical advice.
Always consult a qualified healthcare professional

Have you ever been drifting off to sleep when suddenly your whole b...

08/24/2026

Cardiac conduction (automaticity) is the heart's built in electrica...

08/19/2026

A blood clot can become a life threatening emergency if it's not recognized and treated quickly. In this YouTube Short, learn 10 important warning signs of a blood clot, including swelling in one leg, cramp like pain, red or warm skin, a swollen vein, sudden shortness of breath, sharp chest pain, a fast heartbeat, coughing up blood, dizziness, and a cold or pale limb.
Knowing these symptoms can help you recognize when it's time to seek emergency medical care. This educational video explains the signs clearly using evidence based medical information to help raise awareness and promote early treatment.
If you found this video helpful, like, subscribe, and share to help others learn these potentially life saving warning signs.

A blood clot can become a life-threatening emergency if it's not re...

08/14/2026

https://youtube.com/shorts/9QfZgF4NtyU?si=gOFkQ3SPH_NS5Yrt

Do you sleep for 8 hours but still wake up feeling tired? Constant ...

08/12/2026

Learn heart anatomy in a simple, medical lecture designed for students, healthcare professionals, and anyone interested in understanding how the human heart works. In this educational video, you'll explore the location of the heart, the mediastinum, the four chambers of the heart, the right and left sides of the heart, heart valves, pulmonary circulation, systemic circulation, and the complete blood flow pathway through the cardiovascular system.
This lecture also explains the roles of the right atrium, left atrium, right ventricle, left ventricle, the tricuspid valve, mitral (bicuspid) valve, and the importance of the interatrial septum and interventricular septum. You'll also learn about ventricular septal defect (VSD) and why understanding normal heart anatomy is essential before studying heart diseases, heart failure, hypertension, and cardiovascular medications.
What You'll Learn
* Heart location inside the mediastinum
* Four chambers of the heart
* Right atrium vs left atrium
* Right ventricle vs left ventricle
* Pulmonary circulation explained
* Systemic circulation explained
*Complete blood flow through the heart

Learn heart anatomy in a simple, medical lecture designed for stude...

08/07/2026

Some symptoms should never be ignored because they may signal a serious medical emergency. In this short video, learn the warning signs that doctors recommend taking seriously, including chest pain that spreads to the arm, jaw, or back, sudden stroke symptoms such as facial drooping or weakness, unexplained weight loss, a sudden severe headache unlike any you've had before, and blood in the stool, urine, or when coughing. Recognizing these symptoms early and seeking prompt medical care can improve treatment outcomes and even save lives.

This educational video is designed to increase awareness and should not replace professional medical advice. If you or someone else experiences symptoms of a heart attack, stroke, or another medical emergency, call your local emergency services or seek immediate medical attention.

If you found this video helpful, please Like, Subscribe, and turn on notifications for more health tips from .

Some symptoms should never be ignored because they may signal a ser...

08/05/2026

Holding your urine too long may increase the risk of urinary tract infections, bladder stretching, bladder stones, and kidney problems. In this video, learn what happens inside the body when you delay urination too often and when to seek medical attention.

Holding your urine too long may increase the risk of urinary tract ...