Myocardial Ischemia May Result In

question 97

Multiple Choice

Myocardial ischemia may result in:

• A) J waves.
• B) ST segment depression.
• C) QRS duration greater than 0.12 seconds.
• D) inverted P waves.

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Definitions:

Off-Delay Timer

An electromechanical relay with contacts that change state a predetermined time period after power is removed from its coil; on re-energization of the coil, the contacts return to their shelf state immediately; also, a programmable logic controller instruction that emulates the operation of the electromechanical off-delay relay.

Ladder Rung

A single line of logic in a ladder diagram that equates to a control circuit, usually comprised of inputs and outputs represented by symbols.

Relay Coil

A component in electrical and electronic engineering that produces a magnetic field when electric current flows through it, typically used to control a circuit by opening or closing connections in another circuit.

Time Delay

A predetermined period before an action takes place in a circuit or system, often used for timing control in automation.