Nursing Program Terminology and Concepts Quiz

The SA node, or sinoatrial node, acts as the pacemaker of the heart, setting the rhythm for heartbeats. In a healthy heart, the SA node fires at a rate of 60 to 100 beats per minute (bpm) during a sinus rhythm.

Each small box on an ECG paper represents 0.04 seconds, and each big box is equivalent to five small boxes, thus representing 0.2 seconds. So, in the Vincentian Learning Module of the College of Health Sciences Nursing Program, there are 1500 small boxes representing 60 seconds (one minute).

The R-R interval represents the time elapsed between two consecutive R waves, and it is a crucial indicator of heart rate variability. The R-R interval can be measured using small boxes on an ECG. We can determine the heart rate by using the formula: Heart Rate (bpm) = 1500 / R-R interval measured in small boxes.

The p wave reflects the electrical activity of the atria during depolarization. It is a critical component in identifying the origin of the cardiac rhythm. The analysis should look for the waveform, its direction (upright or inverted), and its alignment on the ECG. The p wave's shape, morphology (structure), and axis (direction) can reveal important insights into heart function.

In a normal sinus rhythm tracing, the sequence should be: P wave is followed by a QRS complex, suggesting a 1:1 atrioventricular (AV) association and confirming a sinus rhythm.

The P wave is the first component of an ECG tracing and signifies the electrical activity of the atria. In a healthy heart, the P wave should be upright in Lead II, I, aVL, aVF. This signifies the normal depolarization of the atria.

In a healthy heart, each QRS complex should be preceded by a P wave, indicating a consistent 1:1 AV association. This demonstrates that each atrial contraction properly triggers a ventricular contraction, leading to an efficient pumping of blood around the body.

The Vincentian Learning Module of the College of Health Sciences Nursing Program utilizes a specific ECG paper format. It comprises 1500 small boxes, which represent a total of 60 seconds (one minute).

The Vincentian Learning Module of the College of Health Sciences Nursing Program also uses 300 big boxes on ECG paper. These big boxes represent 12 seconds in total, as each big box is equal to 5 small boxes.

To calculate the heart rate using the R-R interval on an ECG paper, we can utilize the formula: Heart Rate (bpm) = 1500 / R-R interval measured in small boxes. This formula works because 1500 small boxes represent 60 seconds (one minute) on an ECG paper.