Why Can't Tetany of the Heart Occur in Normal Condition

question 260

Multiple Choice

Why can't tetany of the heart occur in normal condition?

• A) There are no distinct motor units in the heart.
• B) There is inadequate oxygen supply via the coronary circulation to metabolically support a sustained contraction.
• C) The refractory period in cardiac muscle lasts almost as long as the duration of the resultant contraction.
• D) The heart contracts with maximal force every beat so it is impossible to increase the strength of cardiac contraction.

Comprehend the functionality of multichannel ECG equipment.

Interpret common terms related to cardiac cycle phases within ECG context.

Apply knowledge of sedentary and intermittent concepts within the context of cardiovascular health and electrocardiography.

Understand the process and importance of electrocardiography tracing in diagnosing heart conditions.