Novedades del último mes en eBooks de Cardiología

¿Y si el colesterol no fuera el malo de esta historia? Durante años nos dijeron que el colesterol era el enemigo. Que había que bajarlo, combatirlo, eliminarlo. Que era el culpable silencioso de los infartos, las arterias tapadas y la muerte prematura. Y mientras repetiamos ese discurso sin cuestionarlo, seguiamos enfermando.En Tu amigo el colesterol, el doctor Carlos Jaramillo nos invita a revisar una de las creencias mas arraigadas y mal entendidas de la medicina moderna. Con rigor cientifico y un lenguaje claro, explica que es realmente el colesterol, por que lo necesitamos para vivir y que ocurre en nuestro cuerpo cuando sus niveles se alteran.Este libro nos enseña a mirar mas alla de los numeros, a entender el contexto metabolico, la inflamacion, el estres, la alimentacion, el sueño y los habitos que determinan la salud de nuestras arterias.Aca se desmontan mitos, se aclaran confusiones y se ofrecen herramientas practicas para recuperar el equilibrio, poder leer nuestros examenes con criterio y tomar decisiones informadas junto a nuestro medico. Porque entender al colesterol es, en realidad, entendernos mejor."Cuando comence a leer Tu amigo el colesterol, supe que estabamos ante un "golazo". La enfermedad mas comun de la humanidad, explicada de una forma que hasta mi tia Ana quedaria fascinada".Esteban Larronde, medico cardiologo@esteban_larronde

If you sever the spinal cord and completely disconnect the human heart from the brain, the heart does not stop beating. It continues to pump blood with perfect rhythm. This is because the heart possesses its own, completely independent electrical generator: the Sinoatrial (SA) Node.Located in the upper right chamber of the heart, the SA Node is a microscopic cluster of highly specialized pacemaker cells. Unlike standard muscle cells that require a nerve signal to move, these cells possess the incredible biological ability of "automaticity." Through a constant, rhythmic leaking of sodium and calcium ions, they spontaneously generate their own high-voltage electrical action potentials, firing the spark that cascades down the heart and forces the muscle to violently contract.This textbook dissects the raw electrophysiology of survival. We explore how the brains autonomic nervous system only suggests the speed (heart rate) to the SA Node, but the node itself remains the absolute master of the rhythm. We also analyze the medical interventions required when this biological battery eventually shorts out.Explore the autonomous power plant in your chest. Understand the relentless, rhythmic biology of the microscopic spark plug that initiates every single heartbeat of your life.

The human heart does not beat simply because it is a muscle. If the muscle fibers contracted randomly, the heart would spasm uselessly, failing to pump a single drop of blood. The true conductor of our lifespan is a highly specialized, microscopic electrical grid known as the Purkinje Conduction System.Unlike standard muscle tissue, these fibers are biologically engineered purely for high-speed electrical transmission. They act as the bodys internal spark plugs, taking the initial electrical pulse from the hearts pacemaker and distributing it with absolute, millisecond precision across the massive ventricular walls. This guarantees that the bottom of the heart squeezes blood upward in one perfect, synchronized wave to defeat gravity.This medical exploration dissects the hidden wiring that keeps us alive. We explore the fatal consequences of arrhythmias, where this electrical grid shorts out, and how modern medical pacemakers attempt to artificially replicate this incredibly complex biological circuitry.Stop viewing your heart as a simple pump. Discover the intricate, high-voltage electrical engineering that silently dictates the rhythm of your survival.

Before 1958, a diagnosis of heart block was a death sentence. The first pacemakers were massive, external machines that plugged into wall outlets, tethering patients to a bed. Everything changed when Wilson Greatbatch, an engineer looking for a way to record heart sounds, accidentally installed the wrong resistor and created a device that generated a steady pulse.This book chronicles the high-stakes engineering race to move that pulse inside the human body. It explores the early medical trials where surgeons and engineers operated in the shadows of ethics to save dying patients. The narrative details the development of the lithium-iodide battery, the breakthrough that allowed these devices to last years instead of days.The author reveals the hidden mechanics of how electricity interacts with human tissue and the evolution of the pacemaker from a crude timer to a sophisticated computer. It is a story of accidental genius and the relentless pursuit of life.Discover the microscopic circuitry that keeps millions of hearts beating today and the visionary pioneers who dared to mechanize the most vital organ.