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"atrial flutter" AND electrocardiography

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atrial flutter ECG recognition sawtooth waves authoritative guidance

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ECG interpretation from this photo:
  • Rhythm: Atrial flutter, likely with about 3:1 AV conduction
  • Atrial activity: Continuous, regular “sawtooth” flutter waves, most visible in leads II, III, aVF and the rhythm strip
  • Ventricular rate: Approximately 100-110 beats/min, fairly regular
  • QRS: Narrow, with no obvious bundle-branch block
  • Axis: Appears normal, consistent with the printed QRS axis of about +42°
  • ST-T segments: Interpretation is limited by prominent flutter waves and photo quality. I do not see a definite diagnostic ST-elevation MI pattern on this image, but ischemia cannot be excluded from a photograph alone.
Impression: Atrial flutter with controlled ventricular response (likely 3:1 block). Typical flutter often produces repetitive flutter waves in the inferior leads; the exact flutter circuit subtype should not be determined from this photo alone. - Fuster and Hurst's The Heart, p. 1176
This needs prompt clinical assessment, especially if new. A clinician should confirm with the original ECG, assess blood pressure and symptoms, look for triggers, and address stroke-risk/anticoagulation and rhythm or rate management as appropriate.
Seek emergency care now for chest pain, shortness of breath, fainting, confusion, new weakness, severe palpitations, low blood pressure, or a persistently rapid heart rate.

Rx of atrial flutter

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"atrial flutter" AND treatment

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2024 ESC atrial fibrillation guideline atrial flutter cardioversion anticoagulation rate control

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For the ECG pattern shown, management should be urgent clinician-led, not self-medication.

1. If unstable: immediate synchronized DC cardioversion

Treat as unstable if there is hypotension, ischemic chest pain, pulmonary edema/severe breathlessness, altered consciousness, or shock.
  • Synchronized electrical cardioversion is the treatment of choice.
  • Anticoagulation should not delay cardioversion when there is hemodynamic instability. - Fuster and Hurst's The Heart, p. 1178

2. If stable: rate control plus stroke prevention assessment

Rate control options, selected according to blood pressure, heart failure status, ejection fraction, asthma/COPD, renal function, and concurrent medicines:
  • A beta-blocker, such as metoprolol
  • Diltiazem or verapamil if LVEF is >40% and there is no decompensated heart failure
  • Digoxin may be considered, particularly in heart failure or sedentary patients
Flutter can be harder to rate-control than atrial fibrillation. - Harrison’s Principles of Internal Medicine, 22nd ed., p. 1988

3. Anticoagulation

Assess embolic risk using CHA₂DS₂-VASc and bleeding risk. Atrial flutter is managed for anticoagulation similarly to atrial fibrillation.
  • If flutter duration is >48 hours or unknown and cardioversion is planned: anticoagulation and a TEE-guided or delayed-cardioversion strategy are generally needed.
  • After cardioversion, anticoagulation is commonly continued for at least 4 weeks, with longer-term treatment determined by stroke-risk factors and future AF/flutter risk.
  • A DOAC is commonly used when appropriate; warfarin is used in some situations, such as mechanical valves or moderate-to-severe rheumatic mitral stenosis.
The 2024 ESC guidance summary lists beta-blockers, digoxin, and diltiazem/verapamil in appropriate patients for rate control, alongside anticoagulation assessment.

4. Restore sinus rhythm

For symptomatic, persistent, or difficult-to-control flutter:
  • Electrical cardioversion is highly effective.
  • Pharmacologic conversion can use agents such as ibutilide in a monitored setting. Other antiarrhythmics are individualized by cardiology because of proarrhythmia and structural-heart-disease considerations.

5. Definitive treatment

For typical CTI-dependent atrial flutter, catheter ablation is usually preferred first-line definitive therapy. It has high long-term success, commonly over 90-95%, with low recurrence of typical flutter. - Harrison’s Principles of Internal Medicine, 22nd ed., p. 1988; The Washington Manual of Medical Therapeutics, p. 237

Also investigate and treat triggers

Check electrolytes, thyroid function, anemia/infection, alcohol or stimulant use, ischemia, sleep apnea, lung disease, and obtain echocardiography where indicated.
For this ECG: arrange same-day medical/cardiology review. Go to emergency care immediately if there is chest pain, breathlessness, fainting, confusion, low blood pressure, or worsening palpitations.
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