Heart blocks

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Table of Contents

Heart blocks its classification

01

The Disease

Ecg’s , symptoms and other possible

Table of Contents Heart blocks its classification 01 The Disease Ecg’s ,
tests

02

Diagnosis

Risk factors & prevalence

03

Etiology

Mechanisms and the pathogenesis

04

Pathology

About drugs and instrumental methods

05

Treatment

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Heart block is a condition where the heart beats more slowly or

Heart block is a condition where the heart beats more slowly or
with an abnormal rhythm.
It's caused by a problem with the electrical pulses that control how your heart beats
Cardiac arrhythmias are caused by disorders in the automaticity, excitability and conducting systems of the heart

Introduction

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Heart blocks

About the Disease

01

Heart blocks About the Disease 01

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Infarctions
Surgery
Drgus
Increased vagal tone (parasympathetics)

Etiology

Infarctions Surgery Drgus Increased vagal tone (parasympathetics) Etiology

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Risk factors

B- blockers, anti arrhythmatics,Ca blockers & Digoxin

Drugs

Usually turner syndrome

Congenital

Previous

Risk factors B- blockers, anti arrhythmatics,Ca blockers & Digoxin Drugs Usually turner
infarction and surgery blocks the impulse conduction

Infarction /surgery

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Sinoatrial block

Type 1 SA block (Wenkeback)

Type 2 SA block(Mobitz)

Type 2 second degree

Sinoatrial block Type 1 SA block (Wenkeback) Type 2 SA block(Mobitz) Type
block

 is a disorder in the normal rhythm of the heart, known as a heart block, that is initiated in the sinoatrial node.

SA block

01

02

03

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Pathology

This is the result of decremental conduction where the increment in conduction

Pathology This is the result of decremental conduction where the increment in
delay

Type 1 SA block

PP intervals are fairly constant (unless sinus arrhythmia present) until conduction failure occurs

Type 2 SA block

This is the only degree of SA block that can be recognized on the surface ECG

2 nd degree SA block

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Symptoms of the Disease

Hypoperfusion to brain causes altered mental status & signs

Symptoms of the Disease Hypoperfusion to brain causes altered mental status &
of shock

Brain

Palpitations,
dysrhythmias

Heart

A

B

B

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Atrioventricular block

Type 1 AV block

Type 2 AV block(type 1 & type2)

Type

Atrioventricular block Type 1 AV block Type 2 AV block(type 1 &
3 AV block

 is a disorder in the normal rhythm of the heart, known as a heart block, that is initiated in the AV node.

AV block

01

02

03

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2,500000

People die because of the complication of heart block

2,500000 People die because of the complication of heart block

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Diagnosis ( ECG)

Type 1 SA block

Increased PR intervals and QRS complex are

Diagnosis ( ECG) Type 1 SA block Increased PR intervals and QRS
present without p waves

Type 2 SA block

Same as type 1 but irregular

Type 1 AV block

PR interval increased & all p waves are conducted

Type 2 AV block (M1)

2 QRS complex are close and 3rd absent

Type 2 AV block (M2)

Absence of QRS complex after 2-3 p waves

Type 3 AV block

PR interval prolonged and QRS are regular

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Treatment

01

02

03

04

Anti arrhythmatics & b blockers

Drugs

It can be done by defibrillator

Treatment 01 02 03 04 Anti arrhythmatics & b blockers Drugs It
or chemically (ibutilide)

Cardioversion

Open heart surgery must be performed

Surgery

Artificial pacemakers must be installed

Pacemackers

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References

^ "sinuatrial block". TheFreeDictionary.com.
^ Mesirca, Pietro; Torrente, Angelo G.; Mangoni, Matteo E. (2015). "Functional role of

References ^ "sinuatrial block". TheFreeDictionary.com. ^ Mesirca, Pietro; Torrente, Angelo G.; Mangoni,
voltage gated Ca2+ channels in heart automaticity". Frontiers in Physiology. 6. doi:10.3389/fphys.2015.00019. ISSN 1664-042X. PMC 4313592. PMID 25698974.
^ "sinoatrial heart block". TheFreeDictionary.com.
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