Intellect PlusHeart & circulation
21 cards. Each one is a 40-second story with a five-minute read behind it.
Your heart pumps 2,000 gallons of blood a day—without a break.The heart, a muscular organ about the size of your fist, works nonstop to move blood through your body. It connects to a vast network of vessels that deliver oxygen and nutrients …
The heart's external and internal structures are a symphony of precision.From the apex to the coronary sulcus, the heart’s chambers and valves orchestrate life-sustaining circulation. Deoxygenated blood enters the right atrium, while oxygenated blood a…
How does the heart pump blood through your body?This video explains the circulatory system's step-by-step process, from the heart's chambers to blood vessels and cells. Learn how blood flows, supports organs, and connects with …- The heart's invisible conductor controls your heartbeatThis video explains how the heart's conduction system works, from the SA node to the Purkinje fibers, and how an ECG maps the electrical activity of the heart. It's essential for …
Why does the heart need its own blood supply?This video explains how the heart pumps blood to itself through its unique coronary circulation, including key arteries like the sinuatrial nodal artery and posterior descending a…
How does blood flow through the heart?This animation shows the path of blood through the heart, from the vena cava to the aorta. It explains how oxygenated and deoxygenated blood moves through the chambers and valves,…
Why computers prefer looking things up over doing the mathCalculating a complex sine wave or a logarithm is computationally expensive. To save time, engineers use a clever shortcut: instead of solving a formula, they simply look up the a…
How light reveals your blood's oxygen without a single needlePulse oximetry is a painless, noninvasive test that uses light to measure how well oxygen reaches your extremities. By analyzing the way blood absorbs different wavelengths of lig…
The heart's chemical alarm system signals when it is being stretchedWhen your heart muscle stretches due to excess blood volume, it releases a specific hormone called BNP. While it was originally named for the brain, it is actually a vital cardiov…
Detecting the silent killer: A wearable patch for hidden heart attacksMost people recognize chest pain as a heart attack, but many cardiac events occur without any outward symptoms. This video features 17-year-old inventor Akash Manoj, who developed…
Can we teach the human heart to heal itself like an embryo?The human heart is one of our least regenerative organs, often replacing dead muscle with permanent scar tissue. But as scientists explore the potential of stem cells, a new front…
The physical imprint of our emotional lives on the human heartCardiologist Sandeep Jauhar explores the profound connection between our feelings and our physiology, demonstrating how intense experiences like grief and fear can physically alte…- Can a smart bra bridge the gender gap in cardiovascular research?For decades, women have been underrepresented in clinical heart studies, leading to a dangerous lack of data on female-specific symptoms. Now, researchers are turning to everyday …
- A single pregnancy indicator could predict a woman's future heart healthObstetrician Meryam Sugulle identifies a reliable but overlooked metric during pregnancy that can forecast a woman's risk of cardiovascular disease. This video explains why this s…
Empagliflozin improves clinical outcomes for patients hospitalized with acute heart failureResearchers who conducted a multinational randomized trial found that the drug empagliflozin provides significant clinical benefits for patients hospitalized for acute heart failu…- Sleep apnea often overlooked in people with heart diseaseA review by the American Heart Association found that obstructive sleep apnea, a condition where breathing repeatedly stops during sleep, affects between 40% and 80% of patients w…
- Metabolic syndrome review ties insulin resistance to diabetes and heart disease riskA review of research on metabolic syndrome—a cluster of conditions including insulin resistance, unhealthy blood fat levels, central obesity and high blood pressure—describes the …
Muscle loss linked to worsening heart conditions in older adultsA review of existing research on sarcopenia—a condition marked by declining muscle strength and function—found it associated with quicker worsening of cardiovascular disease and a…
Atrial fibrillation cases are rising globally and may become a major public health challengeA review of global health data found that the prevalence of atrial fibrillation, a common heart rhythm disorder, has increased by 33% over the last 20 years. Researchers analyzing…
Failing hearts switch fuels as their oxygen-based energy supply dropsA review of cardiac energy metabolism describes how the failing heart faces an energy shortfall, driven mainly by a drop in mitochondrial oxidative capacity. To compensate, the he…
Can you protect your heart without making life difficult?In this episode of the TED Health podcast, host Shoshana Ungleider sits down with preventative cardiologist Dr. Danielle Belardo to explore how to maintain cardiovascular wellness.