Once upon a time, in the bustling town of Healthville, a young boy named Timmy was fascinated by the human heart.

His interest led him to an old library, where he found a book titled 'The Magic of the Heartbeat' filled with curious diagrams.

Among the pages, he was captivated by a series of mysterious lines and spikes called an ECG or electrocardiogram.

Determined to understand these patterns, Timmy decided to build a machine that could read the heart's code.

After gathering materials and working tirelessly, Timmy successfully created a simple ECG machine from his imaginations.

With his friend Laura's help, they connected wires and watched the screen come alive, displaying the rhythm of her heart.

Timmy explained, 'Each beat of our heart sends out an electrical wave. The ECG captures these waves and turns them into a graph.'

They noticed patterns: P waves, QRS complexes, and T waves – each representing different parts of the heart's cycle.

Timmy said, 'The P wave shows when the atria – the heart’s upper chambers – contract to pump blood.'

'Next, the QRS complex shows the ventricles – the lower chambers – are contracting,' explained Laura, who had started reading the book too.

They learned that a healthy heart has a consistent pattern, but changes in the ECG can signal heart problems.

Timmy and Laura dreamed that one day they would become doctors, using ECGs to save lives in their own clinic in Healthville.