Question
Which of the following is not a cardiac poison?
| A. |
Atropa belladonna
|
| B. |
Aconite
|
| C. |
Cerbera thevetia
|
| D. |
Nicotiana tabacum
|
Show Answer
|
Correct Answer » A
Explanation
|
|
Active principle
Main action
- Anticholinergic (antimuscarinic)
Effects
- Dry mouth
- Mydriasis
- Delirium
- Hyperthermia
- Tachycardia
Although tachycardia occurs, the poison primarily affects:
- Central nervous system
- Parasympathetic nervous system
Hence it is classified mainly as:
Neurotoxic / anticholinergic poison
and NOT as a classical cardiac poison.
B. Aconite
Active principle
Effects
- Ventricular arrhythmias
- Hypotension
- Cardiac arrest
Classification
Classical cardiac poison
C. Cerbera thevetia (Yellow Oleander)
Toxic principle
Mechanism
Effects
- Bradycardia
- Heart block
- Fatal arrhythmias
Classification
Cardiac poison
D. Digitalis
Toxic principle
Effects
- Arrhythmias
- AV block
- Hyperkalemia
Classification
Classical cardiac poison